Scientists are now saying the multiverse isn’t just a wild theory—it might actually be real. That means our universe could be just one of many, each with its own rules, realities, and even versions of us. Some of these universes could have totally different physics, like no gravity or light that behaves in strange ways. It sounds like something straight out of a sci-fi movie, but researchers are taking it seriously. The idea comes from trying to explain some of the weird things we see in space that don’t make sense with just one universe. So yeah, the multiverse isn’t just real—it’s way stranger than we ever imagined. Credit:
Universe Evolution: By NASA / WMAP Science Team, https://map.gsfc.nasa.gov/media/030651/index.html
NASAJPL Edu / YouTube
The Royal Institution / YouTube
PowerfulJRE / YouTube
StarTalk / YouTube
Spider-Man: Across the Spider-Verse / Columbia Pictures
Everything Everywhere All at Once / A24
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Universe Evolution: By NASA / WMAP Science Team, https://map.gsfc.nasa.gov/media/030651/index.html
NASAJPL Edu / YouTube
The Royal Institution / YouTube
PowerfulJRE / YouTube
StarTalk / YouTube
Spider-Man: Across the Spider-Verse / Columbia Pictures
Everything Everywhere All at Once / A24
Animation is created by Bright Side.
#brightside
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Music from TheSoul Sound: https://thesoul-sound.com/
Listen to Bright Side on:
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Apple Podcast - https://podcasts.apple.com/podcast/idhttps-podcasts-apple-com-podcast-bright-side/id1554898078
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https://www.shutterstock.com
https://www.eastnews.ru
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FunTranscript
00:00Imagine if somewhere, you know, trillions of light-years away from our world,
00:05there's another version of you watching this very video right now.
00:09Not as crazy as it might sound.
00:11The multiverse theory is having its time of the day,
00:14from Marvel's movies to Spider-verses,
00:17to the recent famous hit Everything Everywhere All at Once.
00:21But it's not just some wild sci-fi concept.
00:25Physicists have been talking about this theory for decades.
00:27Let's see what they say.
00:29Do parallel worlds exist?
00:32If they do, let's hope that this is the reality where you click that subscribe button before diving into the video.
00:39Now everything starts with the Big Bang.
00:43Before the Big Bang, the universe, with everything we know,
00:47was crammed into an unbelievably tiny, super-hot, and mega-dense point.
00:52Our universe is about to burst into existence.
00:55And then, boom!
00:56The most colossal event you can imagine happens.
01:00In an instant, this tiny point expands with indescribable speed.
01:05It's the beginning of everything.
01:06Time, space, and all the galaxies that surround us.
01:10Then, like an extremely hot balloon,
01:12the universe started stretching out in all directions.
01:16Which sounds logical, but what's curious is that this inflationary epoch
01:20lasted for an incredibly brief time, in less than a blink of an eye.
01:24It's like the universe hit the fast-forward button, and then everything eventually slowing down over time.
01:31After this speedy phase, the universe kept growing, but at a more normal pace.
01:36This rapid expansion is called inflationary cosmology.
01:41It explains some big mysteries about our world.
01:43It tells us why it looks the same in all directions.
01:47Why the background radiation is evenly spread.
01:50Why galaxies are where they are, and so on.
01:53The details of how this cosmic inflation works are still a bit mysterious.
01:58But scientists are on it, and the theory itself is universally accepted.
02:02But it wasn't always this way.
02:05To scientists, this idea sounded like insane sci-fi at first.
02:10However, it explains so many things that the scientists just had no choice but pay attention to it.
02:16However, its initial weirdness was just the beginning.
02:20Now, according to this theory, inflation might not be a one-time thing.
02:24It could be happening repeatedly, maybe even endlessly.
02:28Picture the universe as a never-ending cycle,
02:30with each burst of inflation creating its own bubble universe.
02:35And the most important thing is that these bubble universes might not play by the same rules.
02:40Some could be totally weird, where the laws of physics are going crazy in ways we can't even fathom.
02:47Which means, there might be a whole constellation of bubble universes out there.
02:52However, we can't directly see these other bubbles.
02:54They exist beyond the edge of our spotlight.
02:57That's where the multiverse theory comes into play.
03:00People have been chatting about the idea of multiple universes for a long time,
03:05like way back in ancient Greece.
03:08Now, back in the 1990s, people got really interested in this idea.
03:12And this concept started popping up in books and movies.
03:16As a result, scientists began talking about it increasingly in scientific discussions and journal articles.
03:22And nowadays, many scientists and philosophers are into it.
03:26Now, the problem is, there's no solid proof or evidence that these other universes really exist.
03:33It's not a proved or confirmed theory.
03:36It's not even a theory at all, just a hypothesis.
03:39A bunch of interesting thoughts put together.
03:42Before we draw any conclusions, we need much more in the way of clues and evidence.
03:47And unfortunately, it's hard to find the evidence of parallel worlds when we can't live or look past our own.
03:54Which is why many scientists believe that it might not be real.
03:58But not everybody agrees with that.
04:01While critics say that we can't observe the multiverse and therefore can't test it,
04:06some physicists suggest a different approach.
04:09Instead of trying to find these parallel worlds, we could try to look at ours and its history.
04:14Around the 2010s, researchers took a closer look at data from a space gadget called the Wilkinson Microwave Anisotrophy Probe.
04:24Yes, that's a mouthful.
04:25They thought they found signs suggesting that our universe might have bumped into other universes in the past.
04:32Like sort of a collision.
04:33But then, scientists used an even fancier satellite, which had three times better resolution,
04:39looked at the data more thoroughly, and didn't find any strong proof of these universe collisions.
04:45Plus, there was no evidence that other universes were tugging on ours with their gravity.
04:51However, an interesting discovery happened in 2015.
04:55One scientist checked out radiation left over from the Big Bang.
04:59He claimed to see something super bright.
05:024,500 times brighter than expected.
05:05Well, at least based on the stuff, like protons and electrons, scientists think existed in the early universe.
05:12So, he and some others assumed that this might be our first evidence of our universe crashing into others.
05:20But let's assume that it does exist.
05:22The multiverse wouldn't be about human decisions creating alternate timelines.
05:27In quantum mechanics, it's not human decisions that split everything into parallel worlds, but the measurement of subatomic particles.
05:36So, if we look at this theory scientifically, other worlds would be billions of light-years away.
05:41And what's happening to them wouldn't have anything to do with our daily choices.
05:46So, what would it look like?
05:48Well, Max Tegmark, for example, talks about four levels of universes and multiverses.
05:54Level 1 is the extension of our world.
05:57Our universe is a big place.
05:59And in an infinite universe, there would be infinite chunks like ours, each with its own story.
06:05Most of these chunks might look different from ours.
06:08But because there are so many, some might look just like ours.
06:12But they'd be really, really far away.
06:15Level 2 is a universe with different physical constants.
06:18This idea says that our universe is part of a much bigger space where bubbles form.
06:24Each bubble might have its own set of rules, like different laws of physics.
06:29Level 3 is the many-worlds interpretation of quantum mechanics.
06:33This one's a bit tricky.
06:35In the quantum world, things can be weird.
06:38Imagine rolling a dice.
06:40Each number that comes up might create a separate universe.
06:43So, if you rolled a dice and got a 3, in another universe, it would be a 6, and so on.
06:50Yeah, my head's spinning.
06:52This idea suggests that every possible outcome in quantum events creates a whole new universe.
06:58And level 4 is the ultimate ensemble.
07:02This level gets super abstract.
07:05It says that everything, every possible universe or reality, can be described using math.
07:11Hmm, I wish now I hadn't fallen asleep in algebra.
07:15Imagine all the different math equations describing every conceivable way the universe could be.
07:21This level says that every math equation that can describe a universe actually exists.
07:26And they're all real in their own way.
07:29Stephen Hawking was a proponent of the level 3 many-worlds interpretation.
07:34It was one of his last theories before he passed away.
07:36He predicted that the universe is finite and far simpler than many current theories about the Big Bang say.
07:44According to Hawking, the universe is like a giant quantum system, a sea of possibilities and probabilities.
07:51In this view, every outcome of the universe's history plays out in parallel existences.
07:57And we, as observers, play a crucial role.
08:00Our existence and what we observe, according to Hawking, actively shapes the universe we see.
08:07In simple words, the universe is a canvas and we're all painters.
08:12Sounds very cool and insane.
08:14But hey, many things in science were considered crazy before they turned out to be true.
08:20So, is there another copy of you somewhere watching this video?
08:25And who just pressed the like button?
08:27Who knows?
08:27If there are infinite copies of us, scientists assume that we might be like identical twins,
08:34sharing the same origins and starting from one thing, but then developing into separate different people.
08:40And if these worlds exist, perhaps we can even visit them one day.
08:45There could be some connections between us, something that could allow for interdimensional travel.
08:51For example, wormholes.
08:53Well, whatever the truth may be, let's hope that one day we'll discover it.
08:57Until then, stay curious.
09:01That's it for today.
09:02So hey, if you pacified your curiosity, then give the video a like and share it with your friends.
09:07Or if you want more, just click on these videos and stay on the bright side.