0:00 now I don't want to Spook you but
0:02 there's a chance that our entire Milky
0:04 Way galaxy is located in the so-called
0:06 space void it's a region where there's
0:09 relatively little matter compared to
0:11 other corners of the known universe and
0:13 it's much less dense than it is
0:15 elsewhere in the universe in other words
0:18 we might exist in an air bubble in a
0:20 cake if that's true it would mean that
0:22 we're even loner than we thought
0:26 H in our universe all the galaxies are
0:29 constantly moving away from each other
0:31 in order to understand how far they move
0:33 away scientists use something called the
0:36 hubo latra constant it's like a
0:38 speedometer but for Galaxies however
0:41 there's a cosmic mystery called the
0:43 Hubble tension it's challenging what we
0:45 know about the universe's expansion
0:48 scientists used to consider the Hubble
0:50 lator constant a reliable guide but our
0:53 recent observations question this
0:55 reliability the speeds we see in real
0:57 life don't match up with the distances
0:59 we count calculated and expected they
1:01 aren't sure why these measurements don't
1:03 add up researchers followed the moves of
1:06 supernovas and saw that the Universe
1:08 seems to expand faster around us than it
1:11 does overall as if it's actively
1:13 avoiding us specifically H after
1:16 considering this they began to assume
1:18 that we might all live in a cosmic
1:22 void Cosmic voids are vast empty spaces
1:26 between galaxies kind of like between my
1:28 ears they make our entire world looked
1:30 like a big sponge now let's go back to
1:33 the beginning just a fraction of a
1:35 second after the big bang right after
1:37 the beginning of everything the universe
1:39 was a hot compressed plasma it only had
1:42 very tiny variations in density called
1:45 Quantum
1:46 fluctuations after the big bang the
1:48 universe began to expand those Quantum
1:51 fluctuations grew together with it
1:53 creating regions of varying matter
1:55 density because of that the Universe
1:57 didn't expand everywhere uniformly
2:00 instead little claps of matter began to
2:02 gather together over a long period of
2:05 time creating massive structures
2:08 galaxies galaxies are arranged in huge
2:10 walls and filaments with enormous gaps
2:13 in between and these gaps are voids also
2:16 known as dark
2:19 space now these voids aren't truly empty
2:23 in fact they actually hold more than 15%
2:25 of the amount of matter found on average
2:28 throughout the entire universe they
2:30 still contain gas dust dark matter and
2:32 even stars and galaxies however they
2:35 have less density than regions with
2:37 galaxies about a tenth of the average
2:40 matter density which is why we consider
2:42 them nearly empty usually they'll have a
2:45 diameter ranging from about 30 to 300
2:48 million light years that is an enormous
2:51 distance even on a space scale for
2:53 comparison most planets and nebulas we
2:56 found so far have a distance of hundreds
2:58 and rarely thousands of light years away
3:00 from us in the case of voids if you were
3:03 in the middle of one it would just look
3:05 like seemingly Eternal Darkness the
3:08 closest Stars would be so far away that
3:10 they would be almost invisible to
3:14 you some of them are especially large
3:17 they're known as super voids the largest
3:19 known one was creatively named giant
3:22 void ooh it's so big it's impossible for
3:25 us to even imagine 1.5 billion Lighty
3:28 years away with a diameter of 1 to 1.3
3:32 billion light years yeah it's basically
3:34 a big dark vacuum but even this giant
3:38 vacuum isn't entirely empty the giant
3:40 void houses 17 separate Galaxy clusters
3:43 within its expanse however it might not
3:46 be the biggest emptiness in our universe
3:49 there's this thing called the CMB cold
3:51 spot it's this unusually large and
3:54 chilly area of our universe that we saw
3:56 through the microwaves it really stood
3:58 out on the map of our universe I with
4:00 its unexpectedly low temperatures and
4:02 scientists have spent many years trying
4:04 to figure out what the thing is in 2015
4:09 scientist proposed that this place might
4:11 be a supervoid and probably the largest
4:13 one ever being even more original when
4:16 this one they called it the great void
4:19 if it's true this place would be an
4:20 emptiness of about 1.8 billion Lightyear
4:23 in diameter about a thousand times
4:26 larger than typical voids not everyone
4:28 thinks that's possible posible so
4:30 scientists keep arguing over this one
4:33 there's another interesting Theory going
4:35 about this place one researcher
4:37 suggested that this place might have
4:39 been a trace on our collision with a
4:41 parallel world it's a pretty bold
4:43 hypothesis but unfortunately there's no
4:46 way for us to confirm or deny it with
4:48 our current Technologies in any case as
4:51 the universe expands these voids will
4:54 grow and the walls connecting Galaxy
4:56 clusters will stretch and break
4:58 eventually the voids will merge leaving
5:01 gravitationally bound Galaxy clusters as
5:03 islands in the expanding emptiness in
5:06 other words soon or later the great
5:08 emptiness will consume everything in our
5:13 world so it turns out we might be a rare
5:16 occasion in a supervoid when of the 15%
5:19 of matter this would explain why we're
5:21 surrounded by relatively few galaxies
5:24 this discovery if true challenges the
5:27 standard model of cosmology which we
5:30 created with Albert Einstein's help it
5:32 would mean that gravity in general
5:34 behaves differently than what we
5:36 expected according to the standard model
5:38 such a significant under density
5:40 shouldn't exist because of that
5:43 scientists will have to explore and
5:44 consider this idea thoroughly it might
5:47 just challenge our very basic
5:49 understanding of physics the scientists
5:51 call this the local hole the discovery
5:54 of the local hole May hold Clues to
5:56 explaining the FY Paradox maybe in in
5:59 this specific part of the universe where
6:01 we hang out the chance of intelligent
6:04 life developing anywhere nearby is very
6:06 low perhaps all of the sensient beings
6:09 hang out somewhere beyond our
6:13 supervoid but that doesn't mean we
6:15 should lose hope or that life anywhere
6:17 nearby is impossible in fact life in the
6:20 universe might be much more common than
6:22 we previously thought we know that the
6:25 inner planets like Mercury and Venus are
6:28 inhospitable due to exe conditions
6:31 however Venus looks interesting because
6:33 even though it's a crazy toxic Planet
6:35 scientists believe that it was very
6:37 earthlike in the past it could have even
6:40 hosted life unfortunately it was too
6:43 close to the Sun and all the nice
6:44 conditions evaporated over time but
6:47 there's a possibility of microbial life
6:49 surviving in its high altitude clouds
6:53 Mars a cold desert also might have been
6:55 a friendlier place in the past with
6:57 rivers and lakes though now it lacks a
7:00 protective atmosphere ancient life might
7:02 have existed there in that case it would
7:05 leave potential fossils and underground
7:07 microbes could still survive we've
7:10 discovered some signs of them but are
7:11 still debating whether this stuff was
7:13 truly organic or not the gas giants like
7:17 Jupiter and Saturn and ice giants are
7:19 not ideal for life but their moons offer
7:22 hope Europa has an ocean beneath its icy
7:25 surface making it a potential hot spot
7:28 in cetus releases water into space
7:31 carrying complex molecules that hint at
7:33 interesting possibilities and Titan is
7:36 especially unique it has liquid bodies
7:39 on its surface rivers and laks of
7:41 hydrocarbons while its frigid
7:43 temperatures aren't great for life
7:45 scientists Ponder if it might host life
7:47 with a different kind of chemistry
7:50 however it will take us decades to check
7:52 all these celestial bodies and study
7:53 them properly we haven't sent anything
7:56 so far since the times of Voyager 2 but
7:59 if we're lucky we might explore our
8:01 solar system during the 21st
8:04 century we might explore our solar
8:06 system during the 21st
8:10 century in any case there's a lot of
8:12 potential for life even in our solar
8:14 system alone not even mentioning all the
8:17 planets and galaxies we found nearby our
8:20 estimates suggest that the observable
8:22 universe the one we can see might host
8:24 around 5.3 trillion habitable worlds one
8:28 of the most likely candidate so far is
8:30 Kepler 186f it's a potential earthlike
8:34 Planet just 10% larger than Earth this
8:37 planet orbits a red dwarf star which is
8:39 a star a bit dimmer colder but more long
8:42 living than our sign and it's only about
8:45 490 Lighty years away which may sound
8:47 like a lot but remember what distances
8:50 we've discussed with super voids so even
8:52 if we really are in the supervoid we're
8:55 still lucky to have many galaxies and
8:57 planets around and if one day we'll find
9:00 a way to travel through the universe
9:01 leaving the local hole probably wouldn't
9:04 be a
9:07 problem our vast universe is home to
9:10 phenomena such as star devouring black
9:13 holes rapidly rotating pulsars radiant
9:16 nebuli birthing stars and countless
9:19 galaxies yet it may not be endless there
9:22 could be a distinct Edge a cosmic
9:25 boundary let's embark on a journey to
9:27 that possible Frontier
9:29 visualize the universe as a massive
9:31 layered structure at its core is Earth
9:34 enveloped by our solar system which is
9:37 in turn housed inside a Galaxy within
9:39 this Grand
9:40 universe as we journey beyond our solar
9:43 system passing by the planets from Mars
9:46 to Neptune we encounter the heliosphere
9:49 here the solar winds velocity plunges
9:51 dramatically giving way to the near
9:54 stagnant wind at the
9:55 heliopause beyond the ship faces the
9:58 force of the Interstellar wind two
10:01 remarkable emissaries from Earth Voyager
10:03 1 and Voyager 2 now reside in this
10:06 region they revealed the heliosphere
10:09 uneven shape venturing further an
10:11 asteroid belt known as the ort Cloud
10:14 becomes visible believed by some
10:16 scientists to Source Earthbound comets
10:19 Beyond lies the expansive Milky Way
10:22 spanning Around 106,000 light years
10:26 guiding our journey is a cosmic map
10:28 identifying our our location in the
10:30 lanaka
10:31 supercluster however there's more at a
10:34 greater scale the Hydra Centaurus
10:36 supercluster emerges at the universe's
10:39 maximum observable scale a surprising
10:42 Revelation awaits evidence suggesting a
10:44 universe boundary this Edge located an
10:48 astounding 10 billion light years away
10:50 is a testament to time and
10:53 evolution during such a lengthy Voyage
10:56 our sun might wither or explode and the
10:59 way might merge with the Andromeda
11:02 galaxy our Endo is the aidonis supervoid
11:06 a vast empty stretch spanning a billion
11:09 light years this void might result from
11:12 an unfathomable Collision our universe
11:15 meeting another this leads to a
11:17 tantalizing notion of multiple universes
11:20 where every choice leads to alternate
11:22 outcomes in parallel
11:24 realities imagine our universe as a
11:27 bubble eons ago another bubble Universe
11:30 brushed against ours their gravitational
11:33 interplay caused Cosmic distortions as
11:36 they separated a piece of our universe
11:39 might have been taken leading to the
11:40 creation of the aidonis
11:43 supervoid aradena supervoid covers a
11:46 region of space about 1 billion light
11:48 years in size this makes it one of the
11:51 largest known voids in the universe the
11:54 superwave is associated with the
11:55 so-called cold spot in the cosmic
11:57 microwave background radio radiation the
12:00 temperature in this spot is lower than
12:02 the average temperature of the
12:03 background
12:04 radiation the exact origin and nature of
12:07 aridon supervoid is still a subject of
12:10 research this object provides scientists
12:13 with a unique opportunity to study the
12:15 structure and evolution of the Universe
12:17 on large scales yet perceiving the
12:20 universe's entirety remains a challenge
12:23 like an ant on a basketball we see a
12:25 consistent Horizon due to our 3D
12:28 viewpoint but adding Dimensions could
12:30 change our perceptions could black holes
12:33 with their powerful gravitational
12:35 influence offer a passage to these other
12:38 Realms the vast expanse of our universe
12:42 is filled with intriguing structures
12:44 Mysteries and phenomena that continually
12:47 challenge our understanding of the
12:49 cosmos the arinis supervoid with its
12:52 immense size and enigmatic nature stands
12:55 as a testament to the universe's
12:57 capacity to astonish and confound us and
13:00 for those intrigued by the enigmatic
13:02 nature of black holes we invite you to
13:05 explore more in our other videos dive
13:08 deep into the mysteries of these Cosmic
13:10 Giants and join us on a journey of
13:12 understanding and
13:13 [Music]
13:19 wonder the universe is believed to have
13:22 started around 14 billion years ago with
13:24 a big bang and as far as we know it
13:28 hasn't stopped EXP expanding since then
13:31 but if it's so the universe must have
13:33 started somewhere right and there has to
13:36 be the center of the universe somewhere
13:38 out there well experts claim there's no
13:41 center of the universe neither is there
13:44 any center of the expansion it's the
13:46 same everywhere you see it's wrong to
13:49 imagine the Big Bang as an ordinary
13:52 explosion and the universe does not
13:54 expand from the center outward instead
13:58 as far as We Know the universe is
14:00 expanding equally in all
14:03 places in
14:05 1929 Edwin Hubble said he had managed to
14:08 measure the speed of galaxies that were
14:09 located at different distances from
14:11 Earth he discovered that the farther
14:14 they were the faster they were moving
14:16 away from us does it mean we are at the
14:18 center of the expanding
14:20 Universe unlikely it just means that the
14:24 universe is expanding at the same rate
14:26 everywhere and wherever you are it will
14:28 seem to you that you're at the center of
14:30 the
14:31 universe now about that big bang if you
14:35 watched a regular explosion in slowmo
14:38 you'd see material expanding out from a
14:40 central point right after the explosion
14:43 the center Remains the hottest point
14:46 later a spherical shell of material
14:48 starts growing moving away from the
14:50 center of the
14:52 explosion the process continues until
14:55 gravity stops this expansion but the big
14:58 bang was nothing like that it was an
15:00 explosion of space not an explosion in
15:03 space according to the most common
15:06 theory there was no before to speak of
15:09 no space and no time it means that the
15:12 Big Bang was very different from
15:14 anything we're used to and doesn't have
15:16 any Central Point even if we had been
15:19 able to observe it in real life we
15:22 wouldn't have seen an expanding edge
15:24 with empty space beyond
15:26 it the only thing we can detect now now
15:29 is a faint background glow it was left
15:32 by the hot primordial gases that existed
15:34 in the early
15:36 Universe this is called cosmic
15:38 background radiation and it's uniform in
15:41 all directions it can mean only one
15:44 thing it's not matter moving outward
15:46 from one point but space itself
15:48 expanding evenly at the same time the
15:51 idea that the universe is expanding
15:53 uniformly in all directions doesn't rule
15:56 out the possibility that somewhere out
15:58 there there's a denser and hotter place
16:00 that might be called the center of the
16:02 universe but as far as we can see
16:05 there's no sign of such a special point
16:08 the theory that the Universe should be
16:10 uniform is known as the cosmological
16:13 principle it appeared in
16:16 1933 not so long before that some
16:19 scientists believe that the Universe
16:20 only consisted of our home Galaxy if
16:24 this was the case we could definitely
16:26 consider the center of the Milky Way to
16:28 be the center of the
16:30 universe but in 1924 Hubble put an end
16:33 to that debate he showed there were
16:35 other galaxies besides our own but in
16:38 any case how we see the universe is
16:40 limited by the speed of light and the
16:42 finite time since the Big Bang occurred
16:45 even though the observable part of the
16:47 universe is very large it's likely tiny
16:50 in comparison to the entire universe
16:53 which may be infinite the universe might
16:55 have many shapes with or without an
16:58 identifiable Center and if it turned out
17:00 to have a center outside of the
17:02 observable universe this point or region
17:04 of space could be just one of many it
17:08 could be just like the center of our
17:09 galaxy which was considered to be the
17:11 center of the universe
17:14 before you're traveling through deep
17:17 space circling stars and entire
17:20 galaxies looks like this multicolored
17:22 neula will soon collapse under its own
17:24 weight and explode like a supernova now
17:27 let's carefully Circle this black hole
17:30 try not to get caught in its
17:32 gravitational field or it'll swallow you
17:34 like a space monster H wait what's that
17:37 strange structure right there it's a
17:40 glowing wall and if you look closely
17:43 each glowing dot is an entire galaxy
17:46 that wall has about 100,000 of these
17:48 galaxies the Milky Way has 100 billion
17:51 stars so this wall holds a quadrillion
17:55 that's 10 followed by 15 zeros of stars
17:58 just like our sun this giant structure
18:01 is called the South Pole wall it's
18:04 located about 500 million Lighty years
18:06 from Earth by comparison the closest
18:09 star to our home is Proxima centuri and
18:12 it's about 4.2 light years away Rockets
18:15 can cover that distance in about 73,000
18:17 years so the journey to the South Pole
18:20 wall may take longer than our solar
18:22 system exists and this wall is simply
18:25 gigantic even on a cosmic scale it's
18:28 about 1.37 billion light years long to
18:32 give you an idea of how large that is
18:34 the Milky Way is only 100,000 light
18:37 years wide but you can't see this wall
18:39 even with the most powerful telescope
18:42 the problem is that the Milky Way itself
18:44 obstructs your view it's so bright that
18:47 it's hiding this wall it's like trying
18:49 to look at the Starry Sky in a
18:51 metropolis the light pollution won't let
18:53 you do that scientists have been able to
18:56 detect this Galactic wall by measuring
18:58 red shift we know that all objects in
19:01 the universe are moving they spread out
19:03 from each other as a result of the Big
19:05 Bang which happened billions of years
19:07 ago and when galaxies move their light
19:09 waves change slightly by measuring this
19:12 change we can understand what the object
19:14 is and how it moves and this wall isn't
19:17 even the largest in our universe this is
19:20 the Hercules Corona Borealis Great Wall
19:23 it's a giant flat superstructure about
19:26 10 billion Lighty years wide that's
19:28 around 10% of the entire observable
19:31 universe and it's also a wall that is a
19:34 cluster of galaxies we were able to
19:37 detect this giant structure by gamma ray
19:39 bursts it's the brightest
19:41 electromagnetic event in the universe
19:43 you could even see it in the far reaches
19:45 of our universe such bursts are a very
19:48 rare event in the Milky Way for example
19:51 it happens once every few million years
19:54 if we notice many such bursts in a short
19:56 time from the same place it means that
19:58 there are many objects like the Milky
20:00 Way in that place so there are a lot of
20:03 galaxies out there another unusual giant
20:06 structure in the universe is the huge
20:08 large quazar group it's about 4 billion
20:11 light years across so it takes a photon
20:14 of light almost as long as our planet
20:16 has existed just to get from one side of
20:18 the structure to the other and if you
20:20 put the huge large quazar group on the
20:22 scale it would be 6.1 billion billion
20:26 times heavier than our sun scientists
20:29 have found that there are at least 73
20:31 quazars in that structure these are some
20:33 of the most unusual objects in the
20:35 universe they are the active cores of
20:38 galaxies at the center of a quazar is a
20:40 super massive black hole this giant eats
20:43 up the matter around it a wild force of
20:46 gravity twists the matter around the
20:48 black hole forming a disc and this disc
20:51 is the source of the strongest radiation
20:53 out there by comparison the radiation
20:56 from a single quazar is tens or 100 of
20:58 times stronger than that of all the
21:00 stars in our galaxy put together because
21:03 of such strong radiation we can detect
21:05 quazars even at very long distances
21:08 that's why they're also called beacons
21:10 of the universe scientists use quazars
21:12 to study the universe and the movement
21:15 within it one of the most distant
21:17 quazars from us is about 13.1 billion
21:19 light years away this makes it one of
21:21 the oldest objects in the universe it
21:24 appeared about 690 million years after
21:27 the big bang and it's almost three times
21:29 older than our solar system it's still
21:32 glowing with extreme brightness about 4
21:34 and 14 zeros times brighter than the sun
21:37 scientists explain that at the center of
21:39 the giant is a super massive black hole
21:42 800 million times heavier than the sun
21:45 all these giant structures are just
21:46 building blocks of our universe look
21:49 this is our solar system now zoom out a
21:52 little and this is where our home star
21:53 is in the Milky Way Galaxy zoom out
21:56 again here's a local group of galaxies
21:59 all the bright spots here are galaxies
22:01 here's Andromeda and here's the
22:03 triangulum Galaxy plus a few dozen other
22:06 slightly smaller galaxies they're all
22:08 gravitationally connected the size of
22:11 this structure is about 10 million
22:13 Lighty years that's 100 times the width
22:15 of our galaxy zoom out please this one
22:19 is the Virgo super cluster it's 20 times
22:21 larger than the local group there are
22:24 about 30,000 different galaxies and the
22:27 mass of the whole thing is about 1 in 15
22:30 Zer solar masses zoom out again layak
22:34 Kia this structure is almost three times
22:36 larger it includes the Virgo super
22:38 cluster and other smaller clusters and
22:41 there are about 100,000 galaxies here
22:44 huh it's not over yet zoom out one more
22:47 time here's the Pisces cetus
22:49 supercluster complex this giant Galactic
22:52 structure contains about 60 clusters of
22:55 galaxies so there are more galaxies in
22:57 it than grains of sand in the desert you
23:00 know what to do zoom out phew this is
23:04 the observable universe there are over
23:06 500 billion galaxies and the Stars well
23:10 there are about 1 billion trillion Stars
23:14 the observable universe has its own
23:16 structure clusters of galaxies form
23:18 chains and walls as you've seen before
23:21 but these strands are separated by huge
23:23 regions of absolute emptiness these
23:26 areas are called voids in these places
23:29 there is no matter at all there are
23:31 fewer molecules in the voids than in an
23:34 empty room one of these voids has a very
23:37 mystical reputation it's the aridness
23:40 supervoid or the cold spot it appeared
23:43 here only 38,000 years after the big
23:45 bang it's almost 1 billion Lighty years
23:48 wide and could hold hundreds or
23:51 thousands of galaxies with trillions of
23:53 stars some scientists believe that this
23:56 cold spot may have been the result of
23:57 the large lest Collision ever a
24:00 collision of universes there's a theory
24:03 that our universe is some kind of bubble
24:05 a huge sphere that contains all these
24:08 walls and chains of galaxies now imagine
24:11 that there's an infinite number of these
24:12 bubbles they could be parallel worlds or
24:15 different universes many years ago one
24:18 bubble came close to the bubble of our
24:20 universe their walls touched and the two
24:23 universes connected for a while it's
24:25 like two drops of water coming together
24:27 but that Universe kept moving the area
24:30 where the bubbles joined became thinner
24:32 and thinner until that connection broke
24:35 and the two bubbles detached from each
24:37 other at this point the second Universe
24:39 ripped some of the material out of our
24:41 bubble all those galaxies that used to
24:44 fill the aridis supervoid ended up in a
24:46 parallel universe scientists supposed we
24:49 might travel through other bubbles
24:51 flying to the supposed wall of our
24:53 universe would take forever and then it
24:55 would take even longer to fly through
24:57 inter univ IAL space so we have to use
25:01 portals or wormholes here's how it works
25:04 imagine a piece of paper with point a on
25:07 one side and point B on the other
25:09 instead of moving all the way across the
25:11 sheet of paper we just fold the sheet so
25:14 that point a is right above point B all
25:17 that's left to do is make a small hole
25:19 and the journey takes only moments some
25:21 scientists believe that such shortcuts
25:23 through universes lie inside black holes
25:27 but how do you survive falling into a
25:28 black hole you just have to pick one
25:31 that's big enough it's all about gravity
25:34 imagine you're falling into a black hole
25:36 right now the closer you get to it the
25:39 stronger effect it has on you it
25:41 intensifies with every inch at one point
25:44 the gravitational force that affects
25:46 your head is much stronger than the one
25:48 that affects your feet then you turn
25:50 into spaghetti yum but if you choose a
25:53 super massive black hole like the ones
25:55 at the centers of galaxies the
25:57 gravitational force in them increases
25:59 gradually they can be millions of times
26:01 heavier than the Sun and much bigger but
26:04 the gravitational force on your head and
26:05 your feet will be almost equal and you
26:08 will still feel comfortable who knows
26:11 maybe if you manage to survive a fall
26:13 into such a massive black hole you'd
26:15 find yourself in a completely different
26:17 Universe where different laws of physics
26:19 apply but so far this is just a
26:22 [Music]
26:26 theory there are probably 36 other
26:29 civilizations hanging out in the Milky
26:31 Way and over 170 billion galaxies give
26:35 or take in the observable universe
26:38 conditions for life are all over space
26:41 so where is
26:43 everybody nuclear physicist enrio fery
26:46 came up with this exact same question
26:48 during a lunch break with his colleagues
26:50 in 1950 leading to one of the most
26:52 unsettling paradoxes in the
26:55 universe even though there's a huge prob
26:58 ability of extraterrestrial
26:59 civilizations existing we still haven't
27:02 found any clear evidence of
27:06 them when possible explanation comes
27:08 from the zoo
27:10 hypothesis it suggests that advanced
27:12 extraterrestrial socities exist and know
27:15 exactly who we are and where we are but
27:18 intentionally choose to stay hidden
27:21 they're just observing human quirky
27:24 behaviors as if we're in some kind of a
27:26 cosmic Wildlife Park
27:29 but their intentions could be much
27:34 darker If You're a Star Trek fan you
27:37 probably remember the main rule for
27:39 Federation members Starfleet officers
27:42 shouldn't contact species that are not
27:44 Advanced to avoid messing with their
27:46 development even if it means risking
27:48 their own lives now even though it's
27:50 fiction this rule perfectly captures
27:53 what the zoo hypothesis is all about
27:55 beings from other corners of the
27:57 universe see our planet as a cosmic zoo
28:00 with one-way bars they can watch us
28:03 brushing our teeth in the morning or
28:05 walking our dog but we can't catch a
28:07 glimpse of
28:10 them in this Theory non-terrestrial life
28:13 forms deliberately keep their distance
28:15 from us sticking to a hands-off policy
28:17 agreement in the vast Cosmic
28:20 neighborhood it's like those super smart
28:23 beings agreed that we needed to have the
28:25 freedom to shape our own future and
28:27 Destiny following in our own path of
28:29 development without external
28:31 contamination the idea is that these
28:33 super Advanced civilizations could be
28:35 like oh I don't know 500 million years
28:38 ahead of us which would explain why we
28:40 haven't seen any signs of them and maybe
28:43 it's better this way as humans could
28:45 eventually be destroyed or even
28:47 assimilated by this new cosmic power
28:50 Independence Day
28:53 style as much as things like going to an
28:55 art museum might be interesting to us
28:58 extraterrestrials probably wouldn't be
29:00 too thrilled watching us stare at the
29:02 Mona Lisa painting for
29:05 hours interplanetary cultures might be
29:07 more into buying tickets to quietly
29:09 observe how we're developing new
29:11 technologies such as ultramodern
29:14 satellites according to the zoo Theory
29:17 they can't reach out to us until we hit
29:19 a certain level of development so
29:21 improving our technology and wisdom
29:23 could be the only way to show them that
29:25 we're mature enough and don't need their
29:27 spaceship parenting
29:29 anymore there are a couple of reasons
29:31 why it's hard to buy into the zoo
29:33 hypothesis I mean okay extraterrestrials
29:37 might not visit or reach out because
29:39 we're not all that advanced but it is
29:41 tough to explain why they keep ignoring
29:44 all our attempts to communicate even if
29:46 the zookeepers try their best not to
29:48 interfere with animals lives and
29:50 behaviors I bet they couldn't just
29:52 ignore a bear speaking in loud and clear
29:55 English about its desire to communicate
29:59 so that's pretty much why humans keep
30:01 trying and trying to provoke some
30:04 reaction from inhabitants of other
30:06 planets using radio
30:09 signals in 2017 in a Valley 8 Mi
30:12 southeast of the Norwegian city of truma
30:15 a radar antenna transmitted some
30:18 specially composed electronic music to
30:20 potential Intergalactic listeners the
30:23 target audience was in GJ 273 also known
30:27 as light and star it's a runty red dwarf
30:31 located 12 light years from our Solar
30:33 System since radio waves travel at the
30:35 speed of light we'll have to wait more
30:37 than two decades before looking for a
30:41 reply but the main problem with radio
30:43 ways is that we're kind of in the dark
30:46 about where to look and civilizations
30:48 might be as far as 177,000 light years
30:51 away plus we don't know which radio
30:53 frequency extraterrestrials use to chat
30:59 now here on Earth we use the radio
31:01 spectrum to send signals into the
31:03 universe assuming that what works for us
31:06 might be a common method for other
31:08 civilizations but in fact it could be
31:10 considered a somewhat old school
31:12 technique for other beings that's why
31:14 current projects are now looking for
31:16 techno signatures which are signs of
31:19 technological activity from
31:21 extraterrestrials like City Lights solar
31:23 panels Mega structures or artificial
31:26 satellites
31:28 another potential clue is to study the
31:31 atmospheres of planets orbiting nearby
31:33 stars as an advanced civilization might
31:36 be altering its atmosphere with
31:37 different gases making it detectable
31:40 despite Decades of observations there is
31:43 still no definitive evidence that
31:45 advanced extraterrestrial civilizations
31:47 are out there but that doesn't mean they
31:50 don't
31:51 exist even by expanding search Fields
31:54 we're talking about odds much Slimmer
31:56 than hitting the jackpot with with a
31:58 roughly 1 in three billion chance of
32:00 finding an advanced civilization within
32:02 a given distance from
32:04 Earth maybe space creatures are
32:07 responding to our communication attempts
32:09 but in a way that we can't understand
32:12 the universe has been around for more
32:13 than 133 billion years while humans
32:16 showed up just 200,000 years ago and
32:19 this is about
32:20 0.01% of the universe's age it's like
32:23 we're still learning to talk while other
32:26 super smart beings might be sending us
32:28 messages that are all Lost in
32:31 Translation we keep waiting for a giant
32:34 UFO to land on Earth and for green ETS
32:37 with huge eyes to come out of it but we
32:39 forget that our Intergalactic neighbors
32:41 could be more interesting in building
32:43 Nano Technologies to watch over us they
32:46 could also be trying to communicate
32:47 using neutrinos which are subatomic
32:50 particles with an extremely small mass
32:53 that could effortlessly pass through our
32:54 planet without being detected by our
32:56 current technological iCal
32:59 devices now the zoo hypothesis has
33:02 another issue it is pretty tough to
33:04 believe that with all these
33:06 civilizations supposedly hanging out in
33:08 the universe they would all decide not
33:11 to reach out to
33:12 humans for this to happen there would
33:15 have to be a great sense of structure
33:17 with a higher intelligence working as
33:19 the head of the universe giving them
33:21 direct orders and clear rules to keep us
33:24 isolated but we're talking about
33:26 billions of possibili ities for life
33:29 right more civilizations mean that there
33:31 are more chances of a violation of this
33:34 no contact
33:36 rule so most likely at least one
33:39 independent Planet would be just as
33:41 desperate to find life in the universe
33:43 as we are some scientists also believe
33:46 that if such Advanced life had
33:48 substantially colonized Earth and many
33:50 other planets we would know it by
33:53 now the zoo hypothesis has two other
33:56 variations that are even more
33:58 frightening in the laboratory hypothesis
34:01 nobody contacts us because humankind is
34:04 actually being subjected to experiments
34:07 and Earth is essentially a giant science
34:10 lab other worldly creatures could be
34:12 analyzing human responses to various
34:14 survival challenges such as tsunamis or
34:17 massive
34:19 earthquakes in this case the no contact
34:22 agreement between all other space groups
34:24 would make a bit more sense
34:28 since it's in the name of scientific
34:29 research for the greater good at least
34:32 for
34:33 them the planetarium hypothesis proposed
34:36 in 2001 suggests that we are living in
34:39 an artificial Universe in some kind of
34:42 virtual reality designed to give us the
34:44 illusion that the universe is empty when
34:46 it's not but no possible generator could
34:50 test this
34:52 hypothesis besides the zoo the
34:54 laboratory and the planetarium theories
34:56 there is another possible answer to the
34:58 fmy Paradox nobody contacts us because
35:02 humans are completely alone in the
35:04 universe this is known as the rare earth
35:06 hypothesis and it emphasizes how Earth
35:09 occupies an incredibly unique position
35:12 no other planet could bring life to the
35:14 universe that could be more than just
35:17 bacteria we may consider ourselves
35:20 pretty lucky as even a small change in
35:23 any of Earth's orbital parameters like
35:25 the distance from the Earth to the Sun
35:27 or the rate of rotation could make
35:29 conditions too extreme for people or
35:31 life in
35:32 general but again it's hard to think
35:35 that we are alone in this vast universe
35:38 so we're back to the Paradox where is
35:44 everybody the universe is expanding and
35:47 if it's expanding then it probably had a
35:49 beginning somewhere now all we have to
35:51 do is to run time backward and see where
35:54 the beginning was it took the scientists
35:57 many more years to come up with a
35:59 full-fledged Theory The Big Bang Theory
36:03 and here it is nothing has ever been
36:05 anywhere because neither when nor where
36:08 existed but actually
36:11 no there was one thing it was the
36:14 so-called Cosmic Singularity a state of
36:17 our universe in which it was incredibly
36:18 small dense and very very hot imagine if
36:23 our universe was compressed into a small
36:25 ball the pressure and temperature in
36:27 side would be enormous at some point it
36:29 became impossible to withstand them and
36:32 here comes the Big Bang it was an
36:34 outburst of energy and matter that
36:35 created everything we see now time and
36:38 space basic physical
36:40 forces it also scattered quarks
36:43 everywhere these quarks tiny particles
36:46 that make up our world were all boiling
36:49 in an incredibly hot Cosmic broth when
36:52 it cooled down gravity began to attract
36:55 them to each other they gathered into
36:57 atoms
36:58 then molecules and then into the first
37:00 objects in the world
37:03 stars but what was before that Alan
37:06 Harvey goth an American theoretical
37:08 physicist and cosmologist has devoted
37:11 his whole life to solving this mystery
37:14 after learning about the Big Bang Theory
37:16 Guth found some flaws in it for example
37:19 the distribution of matter was very even
37:22 although it shouldn't have been if we
37:24 drop the balloon filled with paint down
37:26 it will burst will'll see absolute Chaos
37:29 on the canvas but the early Universe
37:31 don't looked like the early Universe was
37:34 very even and proportional that was
37:37 guth's Discovery the theory of inflation
37:40 here's what it says even before the Big
37:43 Bang there was some kind of force that
37:45 could give the bang a strong
37:46 acceleration something that was able to
37:48 distribute everything in space instantly
37:51 and evenly Martin booval is a German
37:55 professor of physics and in his opinion
37:58 the universe was born quite differently
38:00 according to Martin's Theory The
38:02 Singularity couldn't just appear out of
38:05 nowhere let's look at a pendulum on the
38:07 Old Clock the pendulum rotates back and
38:10 forth its movement is smooth continuous
38:13 and non-stop this is how we usually see
38:16 time it flows and never stops but
38:19 Quantum time doesn't work that way it
38:23 consists of small segments and makes
38:25 short pauses just like with the second
38:28 hand of a clock the beginning of one
38:30 segment of time is always the end of
38:34 another according to the Big Bang Theory
38:36 Once Upon a Time our universe began to
38:39 expand inflate like a
38:41 balloon but sooner or later it will blow
38:44 away back the universe will start
38:47 shrinking and return to the state of
38:49 cosmic Singularity and then Big Bang too
38:53 nothing appears out of nowhere and
38:55 disappears into nowhere
38:58 according to boal's Theory the beginning
39:00 of each universe is the end of the
39:02 previous one our universe is not at all
39:05 the first and not the last millions of
39:08 similar universes existed before us and
39:10 will exist after us this Theory although
39:13 it sounds very logical is far from
39:16 complete so for now all this is just a
39:19 hypothesis but some people come up with
39:21 even stranger ideas Neil Turok a South
39:25 African physicist and his colleague Paul
39:27 steinhardt an American theoretical
39:30 physicist they say that yes our universe
39:33 isn't the first one our universe is just
39:36 one of an infinite number of others and
39:38 all of us are stuck in a cycle of
39:40 endless rebirths of parallel worlds
39:44 according to this Theory our universe is
39:46 located inside a so-called brain as in
39:50 membrane in other words we're stuck in
39:52 some kind of elastic surface that's
39:54 capable of Contracting stretching
39:57 oscillating and so on like pieces of
40:00 fabric on a rope another universe may be
40:02 an inch from ours but we can't see it
40:05 that's because there's a tiny space
40:06 between us and this tiny space contains
40:09 the fourth dimension how do these
40:11 universes originate through brain
40:13 Collision these brains are getting
40:15 closer to each other very very slowly
40:18 until they finally Collide their
40:20 Collision creates two big bangs and two
40:22 parallel
40:23 universes then they're moving away from
40:26 each other the cre created worlds
40:28 continue to live we're currently at this
40:31 stage remember the inflation Theory
40:34 there was a mysterious energy that
40:36 pushed and accelerated the Big Bang well
40:39 if we did Collide With Another Universe
40:41 that would explain everything which idea
40:44 is closer to you how about the idea of
40:48 subscribing
40:51 subscribe there are a lot of unanswered
40:54 questions in physics how did Universal
40:56 energy and matter appear where did
40:59 Gravity come from and much more we've
41:02 been trying for years to get answers to
41:04 these questions and one of the people
41:06 who tried to do this was paramahamsa
41:08 toari the author of the so-called space
41:11 Vortex Theory what is this Theory and
41:14 what does it say about the hidden laws
41:16 of our universe let's figure it
41:20 out Pama Hamza tiwari was the former
41:23 executive director of the nuclear power
41:25 Corporation India he took the space
41:27 Vortex Theory or SVT for short first
41:30 proposed by Renee deart and finalized it
41:34 he was always inspired by physics and
41:36 its greates even since his days as an
41:38 electrical engineering student after
41:41 rigorous studies of the laws of physics
41:43 he discovered new equations defining
41:46 matter and the mass and charge of the
41:48 electron after that he came up with the
41:52 SVT this Theory tried to explain the
41:55 unexplained phenomena in physics
41:57 including the creation of the electron
42:00 and gravitational electrostatic and
42:02 electromagnetic energy Fields as well as
42:04 other things it also described the six
42:07 hidden laws of the universe that underly
42:10 our entire world but first of all let's
42:13 talk about the theory
42:16 itself space Vortex Theory suggests that
42:19 the universe is made up of vortices or
42:22 swirling patterns of energy and
42:24 according to SVT these vortices are the
42:27 fundamental building blocks of the
42:28 universe they're the driving force
42:31 behind the laws of physics and the
42:32 fundamental principles of our world
42:35 basically everything in the universe is
42:37 connected and interconnected through
42:39 these
42:40 vortices this Theory isn't very based on
42:43 any real observations but rather on
42:45 mathematical models and computational
42:48 modeling for example some computational
42:51 models showed how these vortices work in
42:53 hydrodynamics and plasma physics they
42:56 showed that vortices in such systems can
42:59 have a central point of Attraction and
43:01 can be
43:02 interconnected other models were used to
43:04 study how the energies inside the
43:06 vortices move and how they can create
43:09 different frequencies and
43:11 vibrations but some experts have
43:13 criticized SVT for using only models and
43:17 simulations the biggest criticism is
43:19 that this Theory can't actually be
43:21 tested it relies on mathematics and not
43:24 on some experimental data that's why
43:27 it's not accepted as a mainstream
43:29 scientific theory but it's still quite
43:32 interesting and provides a unique
43:33 perspective on the universe and our
43:36 understanding of the laws of physics for
43:38 example according to SVT the universe
43:41 has some underlying hidden rules that
43:43 cause the creation of fundamental matter
43:45 their assembly and movement what are
43:49 these laws and what do they say well
43:51 let's take a look at
43:55 them law one the universe has only one
43:58 primordial entity space I.E absolute
44:01 vacuum that structures matter this law
44:05 states that space is the fundamental
44:07 building block of the universe and that
44:09 it's responsible for structuring matter
44:12 it suggests that space is the
44:14 fundamental entity that creates and
44:16 maintains the structure of matter and
44:18 that all matter in the universe is made
44:20 up of the same fundamental particles
44:22 like electrons and
44:24 positrons let's try to put it in simple
44:26 words imagine that the universe is like
44:29 a big Lego set just like how all the
44:31 Lego bricks are made up of the same
44:33 basic building blocks the universe is
44:36 made up of the same fundamental building
44:38 blocks too and these blocks are called
44:40 electrons and
44:42 positrons but what holds these blocks
44:45 together space of course space gives it
44:48 shape and structure just like how the
44:50 plastic container holds all the Lego
44:52 bricks together in a set so the first
44:55 law states that space is the fundamental
44:58 building block that structures matter
45:00 and holds everything together in the
45:04 universe law two matter is constituted
45:08 with multiples of only one kind of
45:10 fundamental particles electrons and
45:13 positrons this law states that all
45:15 matter in the universe is made up of the
45:17 same fundamental particles the electron
45:19 and positron these two are the Lego
45:22 blocks we've talked about before and
45:25 according to the second law these tiny
45:27 invisible particles make up everything
45:30 from a tiny atom to a giant Galaxy just
45:33 like no matter what the shape or size
45:35 our Lego build is it's still made up of
45:38 the same building
45:40 blocks law three the field distribution
45:43 in space as recognized by contemporary
45:46 physics linked with and emanating from
45:49 matter are effects arising from only one
45:52 fundamental field in space this law
45:55 states that the fields recognized by
45:57 contemporary physics such as the
45:58 electromagnetic and gravitational fields
46:01 are effects arising from a single
46:03 fundamental field in space it suggests
46:07 that this fundamental field is
46:08 responsible for creating everything that
46:10 we observe in the universe so let's try
46:13 to put it simply this time imagine that
46:16 the universe is like a big playground
46:18 all the different fields we observe such
46:21 as the gravitational and electromagnetic
46:23 fields are like different games we play
46:25 in there but no matter what we play
46:28 we're still in one fundamental space
46:31 this is the playground itself it's the
46:33 base that holds everything together
46:36 according to the Third Law Without The
46:38 Playground we wouldn't be able to play
46:40 any games and without this fundamental
46:42 field in space we wouldn't be able to
46:45 observe any fields in the
46:48 universe law four there is no void in
46:52 space anywhere in the whole universe
46:54 except at the centers of the fundamental
46:57 particles of matter electrons and
47:00 positrons this law states that there's
47:02 no truly empty space in the universe and
47:05 that all space is filled with the
47:07 fundamental field the one we talked
47:09 about
47:10 before it says that electrons and
47:13 positrons can be found everywhere and
47:15 even the things we consider to be empty
47:17 like vacuum are actually full of tiny
47:20 particles and according to this law the
47:23 only truly empty spaces we can find in
47:26 the universe are at the centers of the
47:28 fundamental particles electrons and
47:33 positrons law five from only one
47:36 fundamental Universal constant all the
47:39 constants considered universal in
47:41 contemporary physics are
47:43 derivable this law states that all the
47:45 constants considered universal in
47:47 contemporary physics can be derived from
47:49 a single fundamental Universal constant
47:52 it suggests that all the constants in
47:55 physics are interconnected and can be
47:57 explained by a single fundamental
47:59 principle I know you've been doing a lot
48:01 of imagining lately but bear with
48:04 me this time please imagine the universe
48:07 as a big recipe all the constants in
48:10 physics such as the speed of light the
48:12 gravitational constant and the plank
48:14 constant are like the ingredients
48:17 they're very different and there are
48:18 tons of them but just like how all the
48:22 ingredients in a recipe are
48:23 interconnected and come together to make
48:25 one dish all the constants in physics
48:28 come together to make the
48:30 universe and just like how a recipe has
48:32 a main ingredient that holds everything
48:35 together physics also has a single
48:37 fundamental constant that holds
48:39 everything
48:41 together law six the spatial structure
48:44 of sub microcosmic fundamental matter is
48:47 repetitive uniformly in the spatial
48:49 structures of macrocosmic bodies like
48:52 planets stars and
48:54 galaxies this law states that the
48:56 structure of the fundamental particles
48:58 that make up matter is repetitive and
49:00 uniform across all scales from subatomic
49:04 particles to macrocosmic bodies like
49:06 planets stars and galaxies it suggests
49:09 that the same fundamental principles
49:11 govern the structure of matter at all
49:14 scales let's go back to the analogy with
49:17 the recipes and cooking using different
49:20 ingredients and combining them in
49:21 different ways the chef can create new
49:24 dishes these will all be different
49:26 different dishes and they can be very
49:28 simple or very complex but when creating
49:31 them the chef still applies the same
49:33 basic rules and knowledge they have
49:35 right and just like that the Universe
49:38 also creates different structures from
49:40 atoms to planets stars and
49:43 galaxies but it still uses the same
49:45 fundamental principles to create all
49:48 these things so this law suggests that
49:51 the structure of the fundamental
49:52 particles that make up matter is
49:54 repetitive and uniform across all scales
49:58 these are the six fundamental laws of
50:00 the universe according to the SVT and
50:03 even though it's not accepted by
50:04 mainstream science it's still a pretty
50:07 interesting
50:09 [Music]
50:13 concept look at these two pictures at
50:16 first glance one might think well aren't
50:19 they showing the exact same thing truth
50:21 is they don't but both these subjects
50:24 are some of the most complex structures
50:26 humans have ever had the chance to study
50:28 the first image shows a cluster of
50:30 galaxies from our universe the second is
50:33 just a small neuron in the human brain
50:36 after seeing these images some were
50:38 quick to compare them is the universe
50:40 nothing more than a huge
50:43 brain now let's not get too excited
50:46 before we go into describing all the
50:48 similarities between the universe and
50:49 the human brain there is something we
50:52 need to be aware of it's a little thing
50:54 called aania and it's it's when our
50:57 brains make up similarities between two
50:59 objects that are seriously unrelated the
51:02 best example is when we look at clouds
51:04 and start to see all sorts of cute
51:06 animals and weirdly shaped objects we
51:09 might be doing the same thing when
51:11 looking at those two initial pictures
51:13 maybe it's just our brain making up
51:15 similarities where there aren't
51:17 any some scientists became fascinated
51:21 with this huge brain Universe idea they
51:23 wanted to make sure it was not just a
51:25 weird coincidence
51:27 there had to be a way they could measure
51:29 How the Universe compares to the mushy
51:31 organ inside our heads so they started
51:34 with the brain it's probably one of the
51:36 most complicated things we know in the
51:38 whole universe that's because it's
51:41 packed with more than 80 billion neurons
51:44 these cells are responsible for taking
51:46 information from our senses and sending
51:48 out messages all over our body try to
51:52 think of neurons as workers in a factory
51:54 they don't just do their work they
51:56 actually communicate with each other
51:58 thanks to these elements called axons
52:00 and dendrites the axons are responsible
52:03 for carrying electrical signals away
52:06 from the neuron's body to other neurons
52:08 or muscles dendrites on the other hand
52:11 have the task of receiving that
52:13 information all of them together make
52:15 this Mega network of about 100 trillion
52:19 connections the universe is one big
52:22 social network itself too but this time
52:24 it's made up of galaxies you might
52:27 picture the universe as stars and
52:29 planets with a ton of empty space
52:31 between them it's not quite right what
52:34 we can see and measure is known as the
52:36 observable universe and it's really vast
52:40 think about 90 billion Lighty years
52:42 across containing hundreds of billions
52:44 to maybe a few trillion of galaxies
52:47 these galaxies like the one we're
52:49 standing in at this very moment are
52:51 bundled together in groups our Milky Way
52:54 is friends in a way with galaxies like
52:57 Andromeda and triangulum and altogether
53:00 they're a family called the local group
53:03 this family of galaxies is part of an
53:05 even bigger Bunch called the Virgo super
53:08 cluster from what we can tell the space
53:10 between them might not be empty it's
53:13 filled with these threads made up of
53:15 regular matter but there might also be
53:17 this mysterious Dark Matter doing its
53:20 thing scientists didn't stop there they
53:23 decided to take it a bit further they
53:25 started by examining thin slices of the
53:28 human cortex the part responsible for
53:30 our thoughts memories and even our
53:33 Consciousness The Next Step was to
53:35 compare them with equally thin slices of
53:38 the Universe from a computer simulation
53:41 now it's obvious there's this enormous
53:43 size difference between the brain and
53:45 the universe but the way they looked at
53:47 it kind of made them somewhat comparable
53:50 as they zoomed in think 40 times
53:52 magnification these scientists began
53:55 noticing that the structures were very
53:57 much alike at this Zoom the brain's
54:00 neural network looked like the
54:01 universe's Galaxy
54:04 clusters to make sure they weren't just
54:06 imagining things they used two clever
54:08 methods the first one looked at how
54:10 these networks connected and how densely
54:13 packed they were they noticed that the
54:15 middle part of a neuron or its nucleus
54:18 is way tinier compared to its connecting
54:20 fragments likewise Galaxy clusters are
54:23 tiny when you look at the super long
54:25 connecting thread between them the
54:27 second method was about checking how
54:30 organized these networks were versus
54:32 just being random they looked at how
54:35 everything was structured around each
54:36 connection Point whether it was a neuron
54:38 in the brain or a Galaxy cluster in the
54:42 universe the resemblance doesn't stop
54:44 there we know that our brain is mostly
54:47 water about 70% to be precise now the
54:51 cosmic web in space it too has about 70%
54:54 of something only this time it's dark
54:57 energy water and Dark Energy may not be
55:00 the most important elements in each of
55:02 their structures but they might still
55:04 play a part in how everything sets up
55:07 the analogy continues you see the space
55:10 we' need on a computer to map out the
55:12 universe is almost the same as our
55:14 brain's memory storage somewhere in the
55:17 ballpark of 2.5 pedabytes so
55:20 theoretically a chunk of the universe
55:22 could fit in our brains or flip that and
55:25 our entire life's memories could get
55:27 stored in the universe's Network there
55:30 are differences too and we have to be
55:32 aware of them to make sure we're
55:34 assessing things properly for starters
55:36 the universe is pretty much the same all
55:39 over it doesn't change its composition
55:41 that much regardless of where you travel
55:43 in the observable area but our brain not
55:47 so much different parts have different
55:49 jobs also our brain connections send
55:53 information depending on things like
55:55 what you're seeing or touching on the
55:57 flip side the universe's links are Just
56:01 Energy there's also a difference between
56:03 how these two structures came to be it
56:06 turns out that the patterns we see when
56:08 we're gazing up at the stars are all
56:10 shaped by gravity and some weird unseen
56:13 Force called Dark Matter massive
56:16 fireworks in space called Supernova can
56:18 also affect this Cosmic wallpaper on the
56:22 opposite side of the spectrum our brains
56:24 got their shape From Evolution
56:26 that long process where animals
56:28 including us get to pass on the best
56:30 features and data they've learned to
56:32 their offspring so if a trait like a
56:35 certain shape of the brain helped our
56:37 ancestors Dodge a hungry tiger that
56:39 trait got passed down our brains are
56:42 also built the way they are because
56:44 they're supposed to act like a super
56:46 highway for our thoughts quick thinking
56:49 was crucial for people back in the day
56:51 when they needed shelter from wild
56:52 animals or the
56:54 elements now especially if you're you're
56:56 a fan of sci-fi literature you might be
56:58 wondering if the universe is like this
57:01 immense brain what might its body look
57:03 like we might as well be living in
57:06 someone else's head we like to think of
57:08 humans as evolved intelligent and at
57:10 times hard to understand creatures but
57:14 what if we're just tiny neurons in a
57:16 larger more complex
57:18 structure well for the time being we can
57:21 only let our imaginations run wild
57:23 there's no way we can test at this point
57:26 what's outside our universe by all means
57:29 we don't even know how large It Is by
57:31 looking at the parts we can see the
57:33 estimations are that the universe is
57:35 about 95 billion light years in diameter
57:39 even if we'd somehow manag to travel at
57:42 the speed of light though that seems a
57:44 bit impossible at the moment too it
57:46 would take an enormous amount of time to
57:48 reach those supposed edges of the
57:50 universe there's also the theory of the
57:53 Multiverse we don't have much tangible
57:55 proof of this idea either but it does
57:57 claim we live in a universe out of many
58:01 ours has time and space other worlds may
58:04 have different rules and components life
58:06 may look differently out there in ways
58:08 we can't even
58:10 understand having a better understanding
58:12 of the universe is just as important as
58:14 figuring out our brains you see we still
58:17 have many Unsolved Mysteries right here
58:19 under our noses or behind our noses to
58:22 be more precise there are a lot of
58:25 things we've yet to figure out about the
58:27 human brain like how we store and
58:29 retrieve memories we know that each time
58:32 we learn some new piece of information
58:34 our brain changes but we don't have the
58:37 entire process mapped out and it looks
58:39 like it might take a while before we
58:41 fully understand
58:44 it imagine the universe as a gigantic
58:48 elastic balloon that's steadily being
58:50 inflated that's what Dark Energy seems
58:52 to be doing forcing galaxies further
58:55 apart could this Force lead to the end
58:57 of the universe some scientists do think
59:00 so and they've named this potential
59:02 event the Big
59:04 Rip it's challenging to study Dark
59:06 Energy even though it's one of the most
59:08 fascinating aspects of our Cosmos that's
59:11 because it's only visible effect is this
59:14 gentle stretching of space on any
59:16 smaller scale it's virtually
59:18 undetectable compared to Dark Energy
59:21 studying Dark Matter feels like a walk
59:23 in the park even though it's just as
59:25 invis I Dark Matter leaves clear
59:28 evidence of its existence it latches
59:30 onto galaxies and Galaxy clusters
59:33 bending light and altering gravity dark
59:35 energy on the flip side just expands
59:39 nonetheless scientists have found ways
59:41 to examine it mostly by observing the
59:44 universe's expansion as WE peer into the
59:47 distance we are in fact peering back in
59:50 time tracing the universe's
59:53 Evolution Dark Energy could also bring
59:55 about about the end of the universe in a
59:57 massive catastrophic event imagine
60:00 watching helplessly as reality itself
60:02 tears apart with no hope of Escape
60:06 frighteningly it's not some far-fetched
60:08 scenario the available data does not
60:10 eliminate the possibility of a big rip
60:14 is dark energy a force that keeps
60:16 inflating the universe or is it more
60:18 like a
60:19 separator if two galaxies are far away
60:22 from each other they're driven further
60:24 apart leading to increasing Cosmic
60:26 isolation but anything that's already a
60:29 strong structure stays intact immune to
60:32 this divisive
60:34 Force why doesn't it mess things up you
60:37 ask well it's because Dark Energy
60:40 remains consistent as space grows bigger
60:43 the density of dark energy remains
60:45 steady imagine drawing a circle anywhere
60:48 in space taking note of the amount of
60:51 dark energy there do it again after a
60:53 billion years and guess what the the
60:56 amount of dark energy inside your circle
60:58 won't change even though space itself
61:01 has
61:01 expanded that is unless of course dark
61:04 energy has a trick up its sleeve and
61:06 proves to be more potent than a
61:08 cosmological constant all we know for
61:11 sure is that it's something that drives
61:13 the universe to expand more rapidly or
61:16 to put it another way it creates
61:17 negative pressure now negative pressure
61:20 might sound odd pressure is usually seen
61:23 as an outward Force right but in the
61:25 universe it behaves differently pressure
61:28 is a type of energy like mass that
61:30 attracts rather than repels all these
61:33 calculations are what makes the Big Rip
61:35 picture a slow unraveling movie the
61:38 first objects affected are the most
61:40 massive Loosely bound structures like
61:42 giant clusters of galaxies their
61:45 gravitational pull will start weakening
61:47 causing them to drift away into the
61:48 growing Cosmic voids next we notice
61:51 stars on the outskirts of our galaxy not
61:53 following their usual paths but instead
61:56 drifting away like party guests saying
61:58 their goodbyes the night sky would then
62:01 start to dim as our Milky Way would
62:03 gradually
62:05 evaporate the disaster would just
62:07 Accelerate from there the orbits of the
62:09 planet would begin to shift spiraling
62:12 outward just months before the end after
62:15 we've lost the outer planets Earth would
62:18 drift away from the Sun and the Moon
62:20 from Earth we would plunge into the
62:22 darkness
62:23 alone the Stillness of Solitude won't
62:26 last however any remaining structure
62:28 would be destroyed because of the
62:30 expanding space the Earth's atmosphere
62:32 would start to thin gravitational shifts
62:35 would cause chaotic tectonic movements
62:38 in the final hours Earth would fall
62:40 apart Beyond this point the destruction
62:42 would continue unseen nuclei the ultra
62:45 dense cores within atoms would
62:47 disintegrate next black holes dense
62:50 cores would get obliterated in the last
62:53 instance space itself would just r rip
62:57 apart bad as it may sound we may never
63:00 rule out the threat of a big rip however
63:03 it might takes so long that all Cosmic
63:05 structures will have decayed before it
63:07 happens a rough calculation suggests the
63:10 earliest big rip could be in about 200
63:13 billion years technically the sun still
63:16 has about 5 billion years before it
63:18 fades away naturally so by the time this
63:21 event might happen our solar system
63:22 would have long been gone nonetheless
63:25 give us the possible implications
63:27 scientists are placing a high priority
63:29 on understanding the big RIT let's be
63:33 optimistic though I mean if we look at
63:35 the universe's history we should
63:36 consider ourselves lucky we're in what
63:39 cosmologists refer to as the lumeris era
63:43 it means that right now the universe is
63:45 still pretty busy producing new stars
63:47 and we know how important these
63:49 celestial bodies are for maintaining
63:51 Life as we know it however the Golden
63:55 Age of star formation was about 10
63:57 billion years ago ever since that Peak
64:00 the rate of creating new stars has been
64:02 on the decline now why is the universe
64:05 taking this early retirement it's not
64:07 because it's lazy or tired in fact it's
64:10 exactly because we're living in this
64:12 expanding
64:14 Universe for a new star to appear a
64:17 bunch of matter needs to be squeezed
64:18 into a relatively small space it's like
64:21 trying to stuff all your clothes into a
64:23 very very small suitcase as the Universe
64:26 expands the matter is getting spread out
64:29 leading to less and less room in that
64:31 suitcase for creating new
64:33 stars the big freeze another theory
64:37 related to the end of the universe looks
64:39 at this scenario Stars will become IND
64:41 dangered and then extinct species this
64:44 period of star decline is what
64:45 astronomers like to call the degenerate
64:48 era it's estimated to start about 100
64:51 trillion years into the future what'll
64:54 be left in the night sky at at that
64:56 point only the hardened workers of the
64:58 universe white dwarfs neutron stars and
65:01 black holes white dwarfs and neutron
65:04 stars the remnants of medium and large
65:06 stars that have exhausted their nuclear
65:07 fuel will eventually cool off and
65:10 transform into black dwars these black
65:13 dwarfs are like invisible Cosmic Spirits
65:15 just hanging around without doing much
65:17 inert and unseen other neutron stars too
65:21 heavy for their own Good Will stumble
65:23 under their weight and collapse into
65:25 black holes further into the future the
65:28 universe will become a black holes only
65:31 party but even these Cosmic weirdos
65:34 can't cheat time forever black holes can
65:36 fade away too in fact this idea of
65:38 fading black holes came from a brilliant
65:40 mind you might have heard of Steven
65:43 Hawking he suggested that black holes
65:46 slowly shed energy in the form of
65:48 radiation until they shrivel up like
65:50 raisins and evaporate
65:53 completely eventually every single black
65:55 hole will have evaporated will be left
65:58 with a universe in its Twilight years
66:00 settling into its final age aptly named
66:03 the dark era at this point both light
66:06 and matter will be nothing but Distant
66:08 Memories and then well nothing if this
66:12 big freeze theory is correct the
66:14 universe will just remain in a quiet
66:16 dark State stretching into an eternity
66:19 where nothing else ever
66:21 happens most of these theories seem to
66:23 rely on the fact that the universe is is
66:25 expanding but what exactly is it
66:28 expanding into we can't help but wonder
66:31 if there's something else beyond our
66:33 universe right now this question is one
66:35 for which physics doesn't quite have an
66:37 answer for we don't have enough
66:40 facts one suggestion is that time and
66:43 space came to be with the big bang that
66:46 happened around 14 billion years ago so
66:48 logically there's nothing beyond the
66:50 universe however a huge chunk of the
66:53 universe is way out of our sight
66:55 existing beyond the part we can observe
66:57 which is about 90 billion Lighty years
66:59 in diameter because everything's pretty
67:02 much the same wherever you look in the
67:04 universe we can presume that the bits we
67:06 can't see would look pretty much like
67:08 the parts we can but that's just an
67:11 assumption now if the universe is
67:13 infinite there's nothing Beyond it right
67:16 I mean that's just what infinite means
67:19 on the other hand if it's finite and
67:21 growing you'd start to wonder if there's
67:23 a boundary or an edge like a un ival
67:25 Cliff that separates our universe from
67:28 whatever is beyond it it gets even more
67:31 complicated when you realize the
67:32 universe has at least four dimensions
67:35 three for space and one for time and
67:37 it's pretty much impossible for us to
67:39 picture what that might look
67:46 like now when we say the word Universe
67:49 we're already picturing this vast space
67:52 filled with stars planets and comets
67:55 truth is most of us find it hard to
67:56 actually picture how large the universe
67:59 is well try to think of space as the
68:01 biggest playground you've ever seen
68:04 right now our space playground goes on
68:06 for 46 billion light years it wasn't
68:09 always like that on that note you've
68:11 surely heard of The Big Bang Theory
68:14 let's try to unpack it imagine the whole
68:16 wide universe every Star Planet down to
68:19 the smallest particle squished into a
68:22 tiny super hot ball the size of let's
68:25 say an apple from that point on we've
68:28 got a pretty neat road map of how things
68:30 unfolded in the cosmos dive even deeper
68:33 into the universe's past and things
68:36 start to get a bit blurry the energies
68:38 and temperatures rise and suddenly our
68:41 rule book of physics doesn't make sense
68:43 anymore when we reach these Early Times
68:46 gravity that force that keeps our feet
68:48 on the ground starts acting all
68:51 mysterious this is where we bump into
68:53 the great puzzle of our time Quant quum
68:55 gravity and here's the honest truth we
68:58 still got some homework to do on that
69:00 one what made the Big Bang go pop in the
69:02 first place well it's kind of like
69:05 asking what happened before the first
69:07 page of a book there's no page zero or
69:10 at least that's the answer that quantum
69:12 physics provides it tells us that there
69:14 are events in the universe that just you
69:17 know happen it's not because we're not
69:19 looking where we should it's just how
69:21 the universe works or at least that's
69:24 our current understanding of it right
69:26 after the blast everything was just a
69:28 bubbly mix of gas like this soda can
69:31 that just got open this gas which was
69:33 mainly helium and hydrogen began to
69:35 stretch out and cool
69:38 down if we could time travel to those
69:40 times we'd see a younger hotter and
69:43 Cozier Universe cool telescopes like the
69:46 Hubble and James web let us Peak into
69:48 those ancient times and what we see is
69:51 fascinating earlier galaxies were like
69:54 the cute photos of the Universe when it
69:56 was younger tinier less heavy and not as
69:59 evolved as they are now over billions of
70:01 years the universe stretched out like a
70:04 soap bubble imagine countless shiny
70:06 marbles inside it representing stars and
70:09 galaxies as the bubble grew bigger the
70:12 marble spread out today inside our
70:15 bubble we have trillions of galaxies for
70:18 every single Galaxy we can spot there
70:20 are tons more we haven't seen yet some
70:23 are too tiny others are are too far away
70:26 we still can't see them even if we use
70:28 the fanciest telescopes
70:30 available just to paint you a better
70:33 picture know that today our very own
70:35 Milky Way is home to around 400 billion
70:39 stars similar to the sun it was a lot
70:41 different in the past though our galaxy
70:44 began its Journey like a little bundle
70:46 of stuff just a tad denser than most
70:48 things in space A lot of it was actually
70:51 made of Dark Matter our closest star
70:54 friend named Proxima centuri is 4.2 ly
70:58 years away to put that in Earthly terms
71:01 it's like taking a road trip around our
71:04 planet millions of times it's also about
71:06 the same age as the sun if we could have
71:09 looked at the exact spot about 5 billion
71:12 years ago it wouldn't have been there at
71:14 all many stars live together in groups
71:17 kind of like families however most are
71:20 Solo adventurers experiencing the
71:22 vastness on their own when you zoom out
71:25 from our Milky Way and Peak into the
71:27 larger universe it's more well empty
71:30 like a vast piece of Countryside between
71:33 big cities in our Cosmic area we've got
71:36 some cool neighbors the Andromeda galaxy
71:39 for instance is just to stroll away in
71:41 Cosmic terms at 2.5 million light years
71:45 and there are lots of smaller galaxies
71:47 too like the triangulum Galaxy and the
71:50 large melenic Cloud our local hangout
71:53 spot which includes all these G galaxies
71:55 spans about 3 million light years as we
71:59 explore further galaxies seem to gather
72:01 in clusters like suburbs connecting
72:04 these clusters are threads of galaxies
72:07 creating a giant web in the
72:10 universe galaxies are clustered this way
72:12 because just like magnets they love to
72:15 pull stuff towards them if we could turn
72:17 back time we'd see a different picture
72:20 that's because throughout history the
72:22 popular galaxies with lots of stuff
72:24 became even bigger while the less
72:26 popular ones gave their items away from
72:30 Earth we can only see objects that are
72:32 46 billion Lighty years away at the most
72:35 if we put all this space into a giant
72:38 box its volume would be unimaginably
72:41 huge the main reason our universe is
72:43 such a grand spectacle today is that
72:46 it's been growing non-stop every year
72:49 its size increases a little more in fact
72:52 the universe is expanding faster than
72:54 the speed of life
72:55 sure we can't feel it down here on Earth
72:58 but there are clear signs in the
73:00 universe that it's happening we're still
73:02 not sure why the universe behaves like
73:04 that but scientists are working hard to
73:07 figure out this mysterious expansion our
73:10 understanding of the universe has
73:11 changed a lot over the years too back in
73:14 the day when our world had more trees
73:16 than buildings people from all corners
73:19 of the Earth would gaze up at a
73:20 twinkling sky above for many the sky was
73:24 their road map alarm clock and spiritual
73:27 connection point now imagine not having
73:30 a smartphone or a compass and still
73:32 being able to find your way home or
73:34 knowing when to plant your crops that's
73:37 because our ancestors had the sky they
73:40 knew when it was time to take care of
73:42 plants navigate ships or celebrate
73:44 special occasions all by watching the
73:47 stars and planets long ago people in
73:50 Babylon spotted some stars that behaved
73:52 a little weirdly these Stars seem to
73:55 have a mind of their own obviously we
73:58 know now that they weren't stars at all
74:00 they were planets like Venus and Mars
74:03 that sometimes wink at us down here
74:06 there was also a time when we beli the
74:08 Earth was flat well at least some people
74:10 did before Greeks in the 6th Century BCE
74:14 figured out that it's round they even
74:16 managed to guess its size by watching
74:18 shadows in different places they were
74:20 pretty close with their estimations
74:22 especially if you take into
74:24 consideration their limited tools now
74:27 speaking of our planet there was also a
74:29 time when humankind believed the Earth
74:31 to be the center of the universe we also
74:34 believed everything else was just
74:35 spinning around it that was until a man
74:38 named cernus did a bit of research and
74:41 figured out it was actually the sun
74:43 coordinating all the movement in our
74:45 system and soon after other thinkers and
74:48 stargazers joined in on the fun changing
74:51 how we perceive the universe using new
74:53 tools speaking speaking of tools thanks
74:56 to a telescope Galileo found out that
74:58 Jupiter had massive moons tagging along
75:02 we call them the Galilean moons today in
75:04 his
75:05 honor but the universe kept tossing
75:08 surprises our way some people started
75:11 cataloging Stars clusters and nebula
75:14 While others found mysterious rays that
75:16 our eyes can't see and just when we
75:19 thought we had it all figured out Edwin
75:21 Hubble not the telescope but the man
75:23 behind the name discovered something
75:25 amazing too he realized that other
75:27 galaxies are in fact moving further away
75:30 from us these days we're looking at the
75:33 universe in a different way we know how
75:35 the timeline works now we know that our
75:38 time here on Earth is limited no wonder
75:41 astronomers are eagerly scouting through
75:43 the vastness of space looking for
75:45 planets similar to ours there is no
75:47 other planet that can safely accommodate
75:49 us in our solar system but we can use
75:52 our neighboring planets and satellites
75:54 for science ific purposes take Mars for
75:57 instance in the following decades NASA
76:00 is planning to send all sorts of devices
76:02 and even people up there if the
76:04 experiment proves to be successful we
76:07 might end up living there for a while or
76:09 at least use it as a pit stop for our
76:11 next exciting
76:13 destination we've never sneaked a peak
76:15 Beyond the Edge of the observable
76:17 universe what lies there if we managed
76:20 to get there would we find another
76:22 Universe what if the universe we live in
76:25 in is just one of billions of trillions
76:27 of other universes I'm talking about the
76:29 concept of a Multiverse now look there's
76:32 this idea of parallel universes let's
76:34 take one of them it looks exactly the
76:36 same as our universe and still some
76:38 details differ maybe instead of becoming
76:41 a doctor you chose to start a music band
76:43 there maybe one Infamous asteroid
76:46 changed its trajectory and Dinos are
76:48 still roaming Earth in that universe but
76:51 the Multiverse Theory takes it all one
76:53 step further those who believe in it
76:56 state that there might be countless
76:58 realities according to this Theory we
77:00 live in a bubble that is just one of
77:02 many other bubbles which I guess looks
77:04 like bath foam these bubbles constantly
77:07 bob up and
77:08 vanish multiverses are described by a
77:11 few scientific theories which mention
77:13 various possible scenarios from separate
77:15 universes that keep springing into
77:17 existence all the time to regions of
77:19 space that are in different planes than
77:21 our home universe but there's one thing
77:24 these theories agree upon all of them
77:26 suggest that the space and time we
77:28 observe is not the only reality you see
77:31 it's impossible to explain all the
77:33 quirks of our universe if it's the only
77:35 one to exist so it's either inventing
77:38 newer theories that can throw light on
77:40 certain properties of our universe or
77:42 accepting the fact that we're living in
77:44 just one of many many universes all of
77:47 which are different one of the most
77:49 widely known Multiverse theories is
77:51 called inflationary cosmology this is
77:54 the idea that right after the big bang
77:57 the universe expanded rapidly and
77:59 exponentially indeed Cosmic inflation
78:02 does explain lots of the properties of
78:04 the universe we observe for example the
78:07 distribution of galaxies when this
78:09 theory was suggested for the first time
78:11 it was perceived as a piece of Science
78:14 Fiction but it can indeed explain tons
78:16 of interesting features of the world we
78:18 live in so with time people started
78:20 taking it seriously now the theory
78:23 states that inflation might happen again
78:25 and again maybe even infinitely and this
78:28 could create constellations of bubble
78:29 universes of course none of these
78:31 bubbles will have the same properties as
78:33 ours there may easily be places where
78:36 physics as we know it doesn't exist but
78:38 even though some of these universes
78:40 might look like ours they all lie Beyond
78:42 The Realm we can observe directly
78:45 another theory called the many worlds
78:47 interpretation claims that there might
78:49 be multiple branching timelines or
78:51 alternative realities and in each of
78:54 those real ities our decisions play out
78:56 differently which also means very
78:58 different outcomes at the same time the
79:00 only reality you can perceive is the one
79:02 where you live if it's true then the
79:05 question is where are all those other
79:07 universes well they most likely all
79:10 overlap in Dimensions we absolutely
79:11 can't access and at the moment it's not
79:14 possible to travel between universes but
79:17 who knows maybe a few thousand years
79:19 later people will not only find a way to
79:22 prove that parallel universes exist but
79:24 also o invent a method to hop from one
79:26 of them to another unfortunately so far
79:30 there's no solid evidence that
79:31 multiverses exist all the proof we've
79:34 got today is purely theoretical some
79:37 experts even argue that it could be an
79:38 unbelievable Cosmic coincidence that the
79:40 Big Bang created such a perfectly
79:42 balanced universe as ours or if parallel
79:46 universes do exist we might have just
79:48 inhabited the one that had all the right
79:50 conditions for our survival it's still
79:53 unclear whether the Multiverse theory is
79:55 even testable perhaps we just haven't
79:57 thought of the right tests yet now I've
80:01 got one scary thought for you to
80:02 consider what if at one point you
80:05 stopped existing in your home Universe
80:07 the one you were born into what if your
80:09 Consciousness was transported to a
80:11 parallel universe where you're now
80:13 watching this video think of
80:16 [Music]
80:21 this there's this mysterious thing in
80:24 space an unusual spot that scientists
80:27 haven't been able to explain for more
80:29 than 15
80:30 years there are different theories and
80:33 one of them says that maybe this is an
80:35 imprint from a collision with a parallel
80:38 universe is this true well let's
80:42 see take a look at this map this is the
80:45 map of our universe well not really this
80:48 is actually the map of cosmic microwave
80:51 background radiation or simply CMB
80:55 many many billions of years ago there
80:58 was a big bang it was so powerful that
81:01 it created our entire
81:03 universe and of course such an event
81:06 couldn't occur without leaving some
81:08 consequences and these consequences are
81:11 literally
81:13 everywhere the Big Bang left
81:15 electromagnetic radiation which we know
81:17 as
81:19 CMB we don't notice it in our daily
81:21 lives but it's literally here under our
81:24 noses
81:26 and if you had some kind of superhuman
81:28 Vision you would see how everything
81:29 around you shines with this dim
81:33 light this radiation is very important
81:36 if we hadn't discovered the CMB we would
81:39 never have found out about the Big
81:41 Bang previously scientists believed that
81:44 the Universe had always existed there
81:46 was no beginning and there was no end it
81:49 sounded pretty ridiculous to us now but
81:52 less than a century ago people were
81:54 Absolut absolutely sure of it Steven
81:56 Hawking was one of the first scientists
81:58 to Guess that the Universe did in fact
82:01 have a
82:02 beginning the guy was so cool that he
82:04 realized this as a student while working
82:07 on his doctoral
82:09 dissertation but unfortunately he had no
82:12 proof if there was such a strong bang
82:15 billions of years ago then where are the
82:17 traces where's the proof laughed people
82:20 who believed in the Eternal static
82:22 universe theory but don't worry
82:25 they had the proof rubbed in their faces
82:27 real
82:28 soon in 1965 astronomers Arno pienas and
82:32 Robert Wilson discovered CMB and that
82:36 was the first grandiose proof of the Big
82:38 Bang it turned out that radiation was
82:41 everywhere we just didn't notice it in
82:45 fact at first penzes and Wilson
82:47 themselves mistook it for the noise of a
82:49 big city or pigeons or something
82:52 else for their discovery which turned
82:54 turned the world of science upside down
82:56 they received the Nobel
82:59 Prize all right so people learned that
83:02 they were surrounded by electromagnetic
83:04 radiation then they started collecting
83:06 more data about it they accumulated more
83:09 and more info over the years until they
83:12 made this very map this is a map of CMB
83:16 temperatures but while creating it
83:19 scientists discovered something unusual
83:22 let's take a look at this map it looks
83:24 like a large and diverse pattern of cold
83:27 and warm places but in reality our
83:30 universe is quite uniform all
83:32 temperatures on this map are close to
83:35 -45° F with very little difference all
83:40 temperature fluctuations between these
83:41 places are small and each tiny spec
83:44 actually spreads over millions of light
83:46 years so everything in our world is
83:49 pretty calm and stable except for one
83:52 point this cold spot right
83:55 here astronomers first discovered it in
83:59 2004 first it looked like nothing
84:02 unusual it's just a region where the
84:04 temperature is below average for a
84:06 couple of micr Kelvin but remember we're
84:09 not talking about a small area this is a
84:12 giant cold region it's literally
84:14 billions of Lighty years in
84:16 size wait the scientists thought this
84:19 can't be true the universe should be
84:21 consistent everywhere according to our
84:24 our standard model this cold spot simply
84:26 shouldn't exist but it does exist though
84:30 this isn't just some mathematical error
84:32 it's right there so what is this cold
84:35 spot and how did it appear astronomers
84:38 have been trying to find the answers to
84:40 these questions for years even now we
84:44 have only a few theories so let's
84:46 discuss them all Theory one Cosmic
84:50 texture this idea was brought up at the
84:52 end of 2007
84:55 then scientists suggested that this cold
84:57 spot could be the hills of space in
85:00 other words it may be a bumpy region of
85:03 the universe just part of its texture
85:06 but that's a silly explanation so this
85:08 theory was quickly
85:10 discarded Theory 2 the
85:12 supervoid this hypothesis was considered
85:15 the most plausible for a
85:17 while it's stated that the cold spot was
85:20 actually the so-called super void it's a
85:23 terrifying dark place of our universe
85:25 with almost no galaxies and because it's
85:29 an empty region with almost no stuff in
85:31 there it seems cold to
85:33 us however this theory was refuted in
85:36 May 2017 after carefully examining the
85:39 cold spot scientists found out that
85:41 there were no signs of a supervoid there
85:45 moreover voids and super voids which
85:47 actually exist by the way are still very
85:50 small in size the cold spot is literally
85:53 thousands of times bigger than them so
85:56 there must be some other explanation and
85:59 there is one perhaps the most bizarre of
86:01 them
86:02 all Theory 3 a parallel
86:05 universe this controversial idea was put
86:08 forward by cosmologist and theoretical
86:10 physicist Laura merini
86:13 hotton she suggested that the cold spot
86:16 could be an imprint from the Collision
86:17 of our universe with a parallel
86:20 one standard cosmology cannot explain
86:23 such a giant cos MC hole says merini
86:26 hoton this is the unmistakable imprint
86:28 of another universe beyond the edge of
86:31 our
86:32 own her assumption is based on the
86:34 theory of the Multiverse this Theory
86:37 says that there's actually an infinite
86:39 number of universes like ours in the
86:42 world they constantly collide with each
86:44 other giving each other a push which
86:46 creates a new Big Bang so maybe the cold
86:49 spot is a bruise from such a collision
86:53 for quantum mechanics mecs such crazy
86:55 theories are pretty common but for
86:57 standard physics and our simple
86:59 understanding of the world this is Earth
87:02 shattering of course we need strong
87:05 evidence and merini Hon's team has begun
87:08 to work on it Professor Tom Shanks from
87:11 the center for extra Galactic astronomy
87:13 at Durham University also participates
87:16 in this
87:18 research the craziest sounding of the
87:20 Exotic models for the explanation of the
87:22 cold spot the Multiverse is actually the
87:25 most standard in terms of our current
87:27 model of the universe he wrote in one of
87:29 his
87:30 works so what evidence do we need well
87:34 our cold spot is located in the southern
87:37 hemisphere according to Shanks If there
87:39 really was a collision between two
87:41 universes we should find another cold
87:43 spot and it should be in the opposite
87:46 Northern
87:47 Hemisphere if astronomers actually found
87:50 it this Theory would be confirmed and
87:52 it' become the first proof of the
87:54 existence of a parallel universe but
87:57 it's not that easy to find a second spot
88:00 we need the latest highly sensitive
88:02 telescopes we also need to find out some
88:05 info about the nature of dark energy how
88:08 it affects space and in other words
88:10 there's still a lot of work to
88:13 do not so long ago scientists actually
88:16 believed they had discovered the second
88:18 spot researchers from New Mexico thought
88:21 they had found it in the northern
88:22 hemisphere
88:24 but unfortunately this is likely to be a
88:26 mistake the map these researchers used
88:29 had a high measure of Randomness so it's
88:31 possible that their Discovery is just an
88:34 accident caused by other voids so
88:37 basically we haven't found another cold
88:39 spot so far despite careful analysis but
88:42 again even the best modern equipment is
88:45 not perfect and it doesn't mean that
88:47 there's no second spot it just means
88:49 that we haven't found it yet but if one
88:52 day we did find it it could changed the
88:54 world of science
88:55 forever we'd confirm not only the theory
88:58 of parallel universes but also the
89:00 famous String Theory it could explain
89:03 everything that occurs in our world but
89:06 if this happens we'll get even more
89:08 questions than we already have how did
89:10 these two universes Collide how does it
89:12 all work so far it's all just guesswork
89:16 we can't claim that the cold spot is a
89:18 print from the Collision of parallel
89:20 universes but we can't refute this
89:23 either actually we may never know the
89:25 truth at all but it's still interesting
89:27 to strive for
89:32 it how was our universe born and if this
89:36 seems hard to answer then how about this
89:39 what was before our
89:41 universe while scientists are looking
89:43 for the answer to the most difficult
89:45 question in history let's find out what
89:47 they've come up with so
89:52 far in the 20th Century we've shed the
89:55 light on this mystery all thanks to this
89:57 man Edwin
89:59 Hubble one day on Mount Wilson in
90:02 Southern California he aimed his
90:04 telescope at the sky and found out that
90:06 these random clouds of gas flying
90:08 everywhere are actually other galaxies
90:12 and there are a lot of them and also he
90:15 learned something else something that
90:17 changed the world forever they're
90:21 moving so what you may ask well it meant
90:25 one very important thing the universe is
90:27 expanding and if it's expanding then it
90:30 probably had a beginning somewhere right
90:33 now all we have to do is run time
90:36 backwards and see where the beginning
90:39 was it took the scientists many more
90:42 years to come up with a full-fledged
90:43 Theory The Big Bang Theory and here it
90:47 is nothing has ever been anywhere
90:50 because neither when nor where existed
90:53 do do you get it but actually no there
90:56 was one thing it was the so-called
90:59 Cosmic
91:00 Singularity a state of our universe in
91:03 which it was incredibly small dense and
91:06 very hot imagine if our universe was
91:09 compressed into a small
91:12 ball the pressure and temperature inside
91:15 would be enormous at some point it
91:17 became impossible to withstand them and
91:20 here comes the Big Bang it was an out
91:23 out burst of energy and matter that
91:26 created everything we see now time and
91:29 space basic physical forces it also
91:32 scattered quarks
91:34 everywhere these quirks tiny particles
91:37 that make up our world were all boiling
91:40 in an incredibly hot Cosmic
91:42 broth when it cooled down gravity began
91:46 to attract them to each other they
91:48 gathered into atoms then molecules and
91:50 then into the first objects into the
91:53 world stars and all this happened just
91:56 some 12 to 14 billion years
91:59 ago all right now we know how our
92:02 universe was created but what was before
92:06 that Alan Harvey Guth an American
92:09 theoretical physicist and cosmologist
92:12 has devoted his whole life to solving
92:14 this mystery after learning about the
92:17 Big Bang Theory Guth found some flaws in
92:19 it for example the distribution of
92:22 matter was very even although it
92:24 shouldn't have
92:26 been let's hang a balloon filled with
92:28 paint to the ceiling and lay a white
92:31 canvas on the floor if we drop the
92:33 balloon down it will burst and we'll see
92:36 absolute Chaos on the canvas a bunch of
92:39 spots scattered everywhere randomly
92:42 neither is like the
92:43 other but that's not really what the
92:46 universe looked like instead of throwing
92:48 a colored ball from the ceiling let's
92:50 draw a small red dot on the canvas
92:54 now let's expand it a little more and
92:57 more and capture this all on frame by
93:00 frame shooting we'll see a circle
93:02 gradually growing in all
93:05 directions that's the reality the early
93:08 Universe was very even and proportional
93:11 that was guth's Discovery the theory of
93:14 inflation here's what it says even
93:17 before the Big Bang there was some kind
93:19 of force that could give the bang a
93:22 strong acceleration something that was
93:24 able to distribute everything in space
93:27 instantly and
93:28 evenly guth's theory was a success and
93:32 now most scientists rely on it for most
93:34 of them this idea of the birth of the
93:37 universe is quite enough for most but
93:40 not for
93:42 all Martin bojowald is a German
93:44 professor of physics and in his opinion
93:47 the universe was born quite differently
93:50 remember when we talked about Cosmic
93:52 Singularity the state of the universe in
93:54 which it was small infinitely dense and
93:57 super hot according to Martin's Theory
94:00 The Singularity couldn't just appear out
94:03 of nowhere this is nonsense but then
94:06 where did it come
94:07 from let's look at a pendulum on an old
94:10 clock the pendulum rotates back and
94:13 forth its movement is smooth continuous
94:16 and non-stop this is how we usually see
94:19 time it flows and never
94:22 stops but Quantum time ho ho Quantum
94:26 time doesn't work that way it's more
94:28 like the second hand of a clock it
94:30 consists of small segments and makes
94:32 short
94:33 pauses and just like with the second
94:36 hand of a clock the beginning of one
94:38 segment of time is always the end of
94:40 another see what I'm getting at let's go
94:43 back to balloons again according to the
94:46 Big Bang Theory Once Upon a Time our
94:48 universe began to expand inflate like a
94:51 balloon but sooner or later it will blow
94:54 away back the universe will start
94:57 shrinking and return to the state of
94:59 cosmic
95:00 Singularity and then guess what the big
95:04 bang too nothing appears out of nowhere
95:07 and disappears into nowhere according to
95:10 boal's Theory the beginning of each
95:12 universe is the end of the previous one
95:16 our universe is not at all the first and
95:18 not the last millions of similar
95:21 universes existed before us and will
95:23 exist just after
95:25 us this Theory although it sounds very
95:28 logical is far from complete
95:30 unfortunately we don't have enough
95:32 knowledge to find all the evidence for
95:34 it so for now all this is just a
95:38 hypothesis but some people come up with
95:40 even stranger ideas scientists promote
95:43 such unusual theories that no one could
95:45 even think
95:47 of Neil Turk a South African physicist
95:51 and his colleague Paul steinhardt an
95:53 American theoretical physicist look for
95:55 answers far beyond our
95:58 universe they say that yes our universe
96:01 isn't the first one there have been and
96:03 will be an infinite number of them and
96:06 not only will there be endless Big Bangs
96:09 our universe is just one of an infinite
96:11 number of others and all of us are stuck
96:14 in a cycle of endless rebirths of
96:17 parallel worlds this sounds incredible
96:20 and frightening at the same time but how
96:22 does it work
96:25 according to this Theory our universe is
96:27 located inside a so-called brain as in
96:30 membrane in other words we're stuck in
96:33 some kind of elastic surface that's
96:35 capable of Contracting stretching
96:37 oscillating and so on like pieces of
96:40 fabric on a rope these parallel
96:42 universes are located near each other
96:45 each one has a neighbor we're not the
96:48 exception another universe may be an
96:51 inch from ours but we can't see it
96:53 that's because there's a tiny space
96:55 between us and this tiny space contains
96:58 the fourth dimension how do these
97:01 universes originate through brain
97:03 Collision these brains are getting
97:05 closer to each other very very slowly
97:08 until one day they finally Collide their
97:12 Collision creates two big bangs and two
97:15 parallel
97:16 universes then they're moving away from
97:19 each other the created worlds continue
97:21 to live we're currently at this stage
97:24 but when they disappear the brains
97:26 Collide again and this will lead to the
97:28 birth of a new
97:30 universe remember the inflation Theory
97:33 there was a mysterious energy that
97:35 pushed and accelerated the Big Bang well
97:37 if we did Collide With Another Universe
97:40 that would explain
97:41 everything of course everything
97:43 described here is a great simplification
97:46 when you hear that our world is some
97:48 piece of fabric on a Robee it sounds
97:50 like complete nonsense but this idea is
97:52 based on string theory and M Theory two
97:56 giants of quantum mechanics if they turn
97:59 out to be true they could explain almost
98:02 everything in our
98:05 universe creating a theory is an
98:07 incredibly huge process tur and
98:09 steinhardt made a huge amount of
98:11 calculations and swept away many many
98:14 non-working
98:16 theories also to work this out they have
98:19 to overcome the limits of the human mind
98:21 and think in 11 Dimensions at once
98:24 unfortunately this crazy and elegant
98:27 idea was laughed
98:29 at turo and steinhart say that
98:32 scientists are regular people just like
98:34 everyone else they're also afraid of
98:36 change and the unknown and it's really
98:39 scary to question everything we once
98:41 believed in many years ago people didn't
98:44 believe that the Earth was round then
98:46 they were outraged by The Big Bang
98:48 Theory we can't make discoveries without
98:51 struggle and fear that that's why Turk
98:54 and steinhardt don't plan to give up so
98:56 easily after all the evidence that we
98:59 have now only says that each of the
99:00 three theories is equally possible so
99:03 which answer is correct we may never
99:06 know at least not at this stage of human
99:08 development unfortunately as long as we
99:11 have no evidence we can only theorize
99:14 but maybe one day we'll find something
99:16 that will open our eyes once and for all
99:18 maybe one day we'll solve the mystery of
99:21 how our universe came to be
99:31 13.8 billion years ago a mysterious
99:35 explosion happened in space it was chaos
99:38 a time when the stars planets asteroids
99:41 the rest of the space bodies and
99:43 galaxies were born it was the Big Bang a
99:46 theory we all know about but no one
99:48 knows for sure what happened where the
99:51 universe came from and what was there
99:53 before some even think the universe went
99:56 through a cycle where it contracted and
99:58 expanded several times in 1991 a
100:02 cosmologist from Stanford University
100:04 named Andre Linda had submitted an
100:06 article with the main idea that there
100:08 was a possibility the universe had been
100:10 created in a laboratory his theory said
100:14 there was a chance an advanced
100:15 civilization somewhere out there had
100:17 created our universe this civilization
100:20 has made an entirely new Cosmos that
100:22 later revolved its own planets stars and
100:25 intelligent forms of life 30 years later
100:28 many scientists take this Theory pretty
100:30 seriously they even started talking
100:32 about things that we as a civilization
100:35 can do to get to such an advanced level
100:38 the theory says this Advanced
100:40 civilization decided to add technology
100:43 that helped to create a new universe out
100:45 of nothing it happened through Quantum
100:47 tunneling it's when an atom can appear
100:50 on the opposite side of some barrier
100:52 even though it's supposed to be
100:54 impossible considering the laws of
100:55 physics of our world like if you wanted
100:58 to pass a tall wall but you can't pass
101:01 it with ladders or go around somewhere
101:03 imagine you can just walk through it
101:05 like a ghost in our world it's not
101:08 possible but a more advanced
101:10 civilization perhaps can do it plus they
101:13 realized how they could create new
101:15 universes right now on the cosmic scale
101:18 we could be a Class C civilization we
101:21 don't know how to recreate something
101:23 for example conditions on the earth for
101:25 when our Central Star the Sun goes out
101:29 if we manage to become a Class B
101:31 civilization we'll learn to adjust
101:33 conditions to be independent of the Sun
101:35 that means we might be able to learn how
101:37 to live even without it and if we level
101:40 up and become Class A we'll know how to
101:43 recreate Cosmic conditions and produce
101:46 our own Cosmos in our
101:48 Laboratories we think of the world we
101:50 live in through three dimensions of
101:52 space each east west north south and up
101:55 down there's also one dimension of time
101:58 which means we can distinguish past from
102:00 future a Fifth Dimension would represent
102:03 one more extra dimension of space the
102:06 theory of its existence was first
102:07 mentioned in the 1920s it was inspired
102:10 by the theory of gravity by Albert
102:12 Einstein who said SpaceTime is Warped by
102:15 matter and energy we can't perceive
102:18 these four dimensions but we see how an
102:20 object moves and attribute it to gravity
102:23 and maybe there's some other Force like
102:25 the electromagnetic force that's more
102:28 than 1,000 times stronger than gravity
102:30 that could explain things going on in
102:32 that extra dimension of space The Fifth
102:35 Dimension is curved in a way we can't
102:37 see it but the idea about it was
102:39 mentioned in a string theory it
102:42 considers the universe as really small
102:44 strings of mass energy not as particles
102:47 they vibrate in 10-dimensional
102:50 SpaceTime considering six dimensions are
102:52 rolled up way smaller than a single atom
102:55 that led to the picture of the universe
102:57 as a 3D Island that floats in
102:59 10-dimensional space time also The Fifth
103:03 Dimension might be an excellent
103:05 explanation to tell us more about Dark
103:07 Matter that's the invisible stuff with a
103:09 mass but we can't see it nor can it
103:12 interact with ordinary matter and dark
103:14 matter is 85% of all the matter in our
103:18 universe the universe can't be still
103:21 it's constantly in motion either
103:23 Contracting or expanding we used to
103:25 think there were 100 billion galaxies
103:28 but it turns out there are more than a
103:30 trillion the galaxies are moving away
103:32 from each other this is what it means
103:35 when scientists say the universe is
103:36 expanding all the time there are voids
103:39 between galaxies that sometimes stretch
103:41 millions and millions of light years
103:43 across they can seem empty but they can
103:45 also contain way more matter than we can
103:48 find in galaxies still Stars usually
103:51 can't be formed there because the matter
103:53 between those areas has lower density
103:56 but there's still plenty of so-called
103:58 Intergalactic Stars a good example is
104:01 the Virgo Galaxy cluster 10% of which
104:04 are Intergalactic Stars we don't know
104:06 how exactly they got there but there are
104:09 two possible ways one Stars can Collide
104:12 merge or pass close to another galaxy
104:15 which can kick it off from its parent
104:17 Galaxy option number two a super massive
104:20 black hole can accelerate a star to very
104:22 high velocities if they have a close
104:24 encounter which can again make a star be
104:27 expelled from its parent Galaxy if you
104:30 could have a giant magnet you could even
104:33 pull something out from the vicinity of
104:34 a black hole that's possible if the
104:37 magnetic field near a super massive
104:39 black hole is as strong as the black
104:41 hole's gravitational field but it
104:44 doesn't work if we're talking about
104:45 material that's already beyond the black
104:47 holes Event Horizon that's a spot with a
104:50 gravitational force so powerful not even
104:52 light light can get away you'd need to
104:55 accelerate this material to the speed of
104:57 light at least to get away for that
105:00 you'd need an infinite amount of energy
105:03 but a magnet could help if something's
105:05 heading toward the black hole but didn't
105:07 get inside yet when someone mentions a
105:09 black hole you might get a picture of
105:11 some giant void in space but the Milky
105:14 Way is most likely full of thousands of
105:17 smaller black holes that float around
105:19 the Galaxy when a star comes to its end
105:22 it will destroy it itself in a supernova
105:24 explosion which is a cataclysm of energy
105:27 in that explosion the densities in the
105:29 core will reach an intense enough state
105:32 that nothing will be able to escape at
105:34 the same time the major part of the star
105:36 explodes outward but a part of it
105:39 collapses inward creating a black hole
105:42 the bigger the star the bigger the hole
105:45 the black hole then swallows everything
105:47 that comes in its way including other
105:49 stars as well when a star gets sucked up
105:51 into the black hole it's ripped apart
105:54 because of the strong gravity inside the
105:56 black hole some of its parts fall into
105:59 the black hole While others get ejected
106:01 at incredibly high speeds some black
106:04 holes might have been formed in a
106:05 different way the early stages of our
106:07 universe were to say the least pretty
106:09 chaotic it had high temperatures and
106:12 pressures and was in a state that shaped
106:14 the entire Cosmos under the right
106:16 conditions any old gas patch may have
106:19 shrunk itself to become a black hole and
106:21 they came in many different sizes
106:23 from something that weighs a couple of
106:25 pounds to Giant masses like thousands of
106:27 suns and those in between they aren't
106:31 really black black holes are areas with
106:33 strong gravity and no object can escape
106:36 when it gets inside they feed off
106:38 electromagnetic radiation such as light
106:40 and space particles since they're
106:42 consuming matter all the time black
106:44 holes give off a dark glow the Earth is
106:47 not that close to the inhospitable edge
106:50 of the solar system we're the sixth
106:52 planet from it
106:53 scientists made a pretty cool 3D map of
106:55 our solar system where we can see what
106:57 the edge looks like it took them 13
107:00 years to design it the boundary is
107:02 called the outer heliosphere it marks
107:05 the area in space where the solar wind
107:07 which is the stream of charged particles
107:09 our sun emits gets deflected and draped
107:12 back by the radiation coming from the
107:14 empty region beyond our solar system the
107:17 inner layer of the heliosphere is where
107:19 the sun and the planets have a rough
107:21 shape of a sphere while the OU layer is
107:23 not that symmetrical this asymmetry
107:26 happens because our sun is moving
107:28 through the Galaxy and goes through
107:30 friction with the radiation in front of
107:33 it black holes tearing apart enormous
107:36 Stars Pulsar spinning at incredible
107:39 speeds and emitting powerful beams of
107:41 energy colorful nebula with fireworks of
107:43 newborn Stars galaxies of every possible
107:46 color and size all of these are found
107:49 within our universe but it's not
107:52 infinite it has a boundary a literal
107:54 wall and beyond that there's an absolute
107:58 nothingness right now we're going to
108:00 make a journey to that wall but first
108:02 things first our universe is like a
108:04 humongous nesting doll if you open it up
108:07 there's a smaller one inside it's a
108:09 Galaxy inside that is an even smaller
108:12 doll that's our solar system and the
108:15 smallest doll of all is the earth each
108:17 of these dolls has boundaries that we
108:19 are going to cross for that we'll need a
108:22 space ship and a big one it also has to
108:25 be able to move a 100 times faster than
108:27 the speed of light you get on board and
108:30 start the engines 62 Mi above sea level
108:33 is our first boundary that's 10 times
108:35 higher than passenger planes fly this
108:38 point is called the Carmen line it
108:41 separates the atmosphere of the Earth
108:42 from outer space now we fly further to
108:45 the edge of our solar system we turn on
108:48 the hyperdrives and fly past Mars
108:50 Jupiter Saturn Uranus and Neptune
108:53 we've traveled a distance of 100
108:55 astronomical units 1 Au is the distance
108:58 from Earth to the Sun and here's the
109:00 boundry of our solar system the
109:02 heliosphere here the speed of the solar
109:05 wind decreases rapidly first it drops
109:08 from 620,000 mph to the speed of sound
109:12 then there's a layer called the
109:14 heliopause this is where the wind almost
109:17 vanishes and then our ship experiences a
109:20 bow wave this is where we feel the force
109:22 of of the interstellar wind which
109:24 collides with the boundary of our solar
109:26 system when you pass this boundary you
109:29 find yourself in the dark of
109:30 interstellar space and here you can find
109:33 two human-made objects that made this
109:35 trip for the first time in history their
109:37 Voyager One and Voyager 2 Voyager 1
109:41 crossed that boundary in 2004 Voyager 2
109:44 did it in 2007 these space probes
109:47 discovered that the heliosphere is not a
109:49 perfect ball around the Sun its southern
109:52 boundary is 10 a closer to the star than
109:55 the northern one so we're moving in
109:57 interstellar space and will soon
109:59 approach a stone wall around our solar
110:02 system 200,000 Aus further and there it
110:05 is this wall of rock is the or cloud in
110:08 fact it's a pile of asteroids that
110:10 surround our world scientists speculate
110:13 that the or Cloud could be the source of
110:15 comets and meteorites that fall to Earth
110:18 but they're so sparse that we easily fly
110:20 between them now we're in complete dark
110:22 Darkness the Milky Way is about 106,000
110:26 Lightyear wide in a conventional rocket
110:28 it would take billions of years to fly
110:30 across that distance but you throttle to
110:33 the max you masterfully fly past the
110:35 stars and planets as if on a racetrack
110:37 and within minutes you're at the edge of
110:39 our galaxy there's no more Interstellar
110:42 wind all you see are bright dots
110:45 somewhere in the distance these dots are
110:47 huge galaxies we need to look at a map
110:50 to make a route to the edge of our
110:52 entire Universe you're here near the
110:55 Milky Way galaxy it's part of a cluster
110:57 of galaxies called the lania super
111:00 cluster but even this huge thing is like
111:02 a little Street in a big city zooming
111:05 out we find hydris and Taurus super
111:08 cluster thousands of galaxies on the map
111:11 look like little dots maximum zoom out
111:14 this is our entire observable universe
111:17 we thought it was infinite but we may
111:19 have proof that it has a boundary it's
111:22 here 10 billion light years away from
111:24 our home even if you travel at the speed
111:26 of light a trip there would take twice
111:29 as long as our whole planet has existed
111:31 during that time the Sun will either
111:33 fade away or explode like a supernova
111:36 destroying our entire solar system and
111:38 if you can live that long and then
111:40 return home you will see that our galaxy
111:43 is there no more it's long since
111:46 collided with the Andromeda galaxy and
111:48 merged into one big Cosmic body luckily
111:51 your ship is able to to warp SpaceTime
111:53 so that this journey will literally take
111:55 a few seconds boom congratulations
111:59 you've arrived at your destination the
112:01 aridus supervoid some scientists believe
112:05 this location is the evidence of
112:07 collisions of our universe with
112:09 something big enough to leave such a
112:10 large Scar the idonis supervoid is an
112:14 empty and cold Space 1 billion Lighty
112:16 years wide if you think of this void as
112:19 a cup it would fit at least 10,000
112:22 galaxies
112:23 and it appeared after an accident of
112:25 gigantic proportions the object that
112:27 crashed into our universe was another
112:30 Universe yes other universes may
112:33 actually exist imagine that our entire
112:36 universe is a huge bubble that contains
112:38 all the clusters of galaxies in the
112:40 observable universe there could be an
112:42 infinite number of such bubbles they
112:44 could have been born during the big bang
112:47 these universes may be different from
112:48 ours they may have other galaxies and
112:51 nebula but these bubbles could also be
112:53 parallel universes this means that if
112:56 you chose cereal over oatmeal in the
112:58 morning in Another Universe your twin
113:00 would choose the oatmeal every choice
113:03 you ever made in life had completely
113:05 different consequences in a parallel
113:07 universe and because the number of
113:08 choices are infinite there's a whole
113:10 Infinity of parallel universes so like a
113:14 regular bubble our universe has a wall
113:16 that is near the aridus supervoid long
113:19 ago another bubble flew past ours as
113:22 they approached each other their
113:23 gravitational fields began to interact
113:26 our boundary wall began to deform and
113:28 pull toward the other Universe the same
113:30 thing happened on the other side then
113:33 the walls of our universes came into
113:35 contact but as these bubbles moved their
113:37 connection began to break and the other
113:39 Universe just ripped a huge chunk of
113:41 ours a cold void was formed at the point
113:44 of collision and that was the aridus
113:47 Super void the problem is that the
113:49 Universe looks the same to The Observer
113:51 regardless of point of view for example
113:54 imagine a basketball hanging in the air
113:56 now if we put an ant on the ball and
113:58 tell it to find the edge of the ball it
114:00 will start running around it making an
114:02 infinite number of circles but the
114:04 landscape around the ant will not change
114:07 all it will see is a rounded Horizon
114:09 that's because the ball Remains the Same
114:11 from any point of view the same thing
114:13 happens to us when we try to find the
114:15 edge of our universe all because we
114:18 imagine the world in three-dimensional
114:20 space and our view is limited for
114:22 example you see an ordinary Square in
114:25 two-dimensional space but if you add
114:27 depth and change the point of view voila
114:30 it's a cube if we could see the universe
114:32 in four-dimensional space a square might
114:35 be something completely different but
114:37 maybe we can leave our home bubble the
114:40 key to traveling to another Universe
114:42 might be inside a black hole a black
114:44 hole is one of the most mysterious
114:46 objects in the universe they're so heavy
114:48 they warp not only space but time as
114:51 well it's like putting a heavy Boulder
114:53 on a net the net will sag and the closer
114:56 you get to the boulder the stronger the
114:58 curvature is once you're in the
115:00 gravitational field of a black hole you
115:02 can't leave it we still don't know what
115:04 might actually be in the heart of a
115:06 black hole some scientists speculate
115:08 that white holes also exist
115:10 theoretically they should be born along
115:13 with black holes except for the color
115:15 they're the exact opposite of black
115:17 holes nothing can come close to a white
115:19 hole at the moment there's no data on on
115:22 such objects but general relativity
115:24 Theory suggests they do exist there's
115:27 also a theory that a black hole may be a
115:30 passage to another Universe when you get
115:32 into a black hole you can come out the
115:34 other side through the Event Horizon of
115:36 the white hole so you bypass the
115:38 boundary of the universes and find
115:40 yourself in a completely different world
115:43 but we may have proof that a white hole
115:45 exists in 2006 scientists discovered an
115:49 unusual burst of energy somewhere 1.6
115:51 billion Lighty years away from Earth
115:54 this burst was unique it didn't look
115:56 like a supernova explosion or even the
115:58 merger of two black holes some
116:00 astronomers believe it was the birth of
116:02 a white hole but because it was unstable
116:05 it was destroyed almost immediately this
116:07 process was reminiscent of the birth of
116:09 our entire universe the Big Bang so
116:12 scientists called it the little Bang
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