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Like it or not, life is full of regrets and
embarrassing moments.
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You sleep through your alarm and miss a flight,
spill coffee on your shirt, call your date
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by the wrong name.
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(Ooh, that’s a felony!)
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Is there a way to take it all back?
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Psh, only in an alternate universe!
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Wait, but could you really?...
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When you look up at the night sky, you see
thousands of bright shining little dots we’ve
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come to call “stars” …at least in the
English language.
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Then there’s that big cheese-looking thing.
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Yeah, the moon.
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When you look at the same sky using the most
powerful telescopes, you'll see even more
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stars and galaxies spread around space in
a sphere about 92 billion light years in diameter.
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This is already impressive and huge, but does
it all end there?
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Can you actually go beyond that sphere?
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Science says… “probably.”
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Well, that’s anticlimactic…
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Physicists call this concept the multiverse.
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So while the “universe” technically means
everything that exists, the “multiverse”
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means an infinite number of those “everythings.”
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Yes, there’s not just one alternate or parallel
universe like you see in movies, TV shows,
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and so on.
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There’s an uncountable number of universes
that exist side by side in higher dimensions
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that we can’t even perceive or observe.
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In each of these universes, there’s an alternate
copy of yourself that looks a lot like you.
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Only, they make different choices that lead
to different outcomes on a daily basis.
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One of those “you’s” might’ve set
3 alarms, woke up no problem, and didn’t
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miss the flight to your sister’s wedding.
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Then, in some other universe, you never skipped
physics in high school, went on to study it
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in college, and became an awesome scientist
who discovers the multiverse!
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Hey, maybe in one of those versions you called
that date by the right name, and you two ended
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up being soulmates!
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(Or maybe you saved yourself in this one – what
if they were looney!?)
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Anyway, all of this sounds pretty awesome
as it gives endless opportunities.
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But is there any scientific proof it could
be real?
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To answer that question, let’s start small.
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In the universe, be it ours or some parallel
kind, everything is connected.
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The smallest things directly influence the
largest things.
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Everything in that universe (including you
and me!) is made of atoms.
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Atoms, in turn, are made up of electrons,
protons, and neutrons.
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We’ll skip the morons for now.
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Quantum physics (that’s the science that
studies all these teeny tiny particles) say
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electrons have a superpower: instead of just
moving in one direction, they can spin both
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clockwise and counterclockwise.
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Now, atoms, powered with these super particles,
can do plenty of things.
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They can go to the left or right, they can
jump up and down, spin, and whatnot.
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But according to quantum physics, they don’t
choose just one option but do everything they
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possibly can at the same time!
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The “multiverse” concept is based on the
same idea.
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Anything that can happen actually does happen
somewhere out there.
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Every possible combination of particles and
every possible scenario gives birth to a different
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universe.
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One of such possible scenarios brought our
universe into existence billions of years
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ago.
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Before the Big Bang, the universe was a super
hot, small, and dense point with no stars
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or any form or structure whatsoever.
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About 13.8 billion years ago, give or take,
this tiny point started expanding at a crazy
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speed.
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Atoms were formed, and then stars and galaxies.
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All this expansion never really stopped – it
just slowed down.
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To this day, galaxies keep moving away from
each other as the space fabric between them
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is being stretched.
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While this is happening, other universes pop
up into existence.
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Some of them have no atoms, galaxies, or living
beings because they may be expanding or collapsing
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way too fast.
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But there must be others that are more like
our universe with many alternate versions
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of you and me.
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As long as it’s possible for life to evolve,
it’ll continue to do so.
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Just like there’s an infinite number of
combinations of particles and universes, there’s
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an infinite number of possible physical laws
ruling in those universes.
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In one, for instance, electrons are much heavier
than here, energy behaves differently, and
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gravity is much stronger than in our world
– the possibilities are limitless!
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Hey, here’s something to think about: perhaps
in one of those universes, life is two-dimensional?
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I know, it breaks the brain to think about
it.
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I guess it’d be like looking at a comic
book about your life!
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What would your comic book be called and what
would be the best scenes in it?
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Let me know down in the comments!
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Here’s another cool one to consider: let’s
say the visible light spectrum is reversed
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in one of those worlds.
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So, what you now see as blue would be orange.
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What’s red would be green.
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Oh, that big yellow sun in the sky?
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It’s now purple!
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Anyway, back to the sciencey stuff.
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Because space-time constantly begins and stretches,
it just has to repeat itself at some point.
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At least that’s what mathematics say.
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But could you ever travel to another space-time?
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If you believe there’s been more than one
Big Bang, traveling to another universe would
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be like going back in time to the moment before
our own was born.
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Traveling back in time is really tricky.
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But it’s not completely impossible if you
trust the theory of general relativity.
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Why wouldn’t you?
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Einstein was a smart guy!
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According his famous theory, you can make
a loop out of space-time and travel through
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it.
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Imagine it like a rollercoaster that would
relocate you in both space and time to the
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point before you started the journey.
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Stephen Hawking, however, questioned this
possibility by asking why we haven’t seen
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any time travelers from the future yet.
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As for traveling to the future, it’s also
possible according to the same theory.
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Einstein believed time is not an absolute.
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You can actually stretch or squeeze it – all
it takes is a certain speed.
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If you get close to the speed of light, time
will slow down.
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When you stop, more time will have gone by
for everyone else than for you.
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So, you’ll have traveled to the future,
even if it’s not by much!
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Another possible option to travel to the future
is based on gravity.
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According to Einstein’s theory, gravity
slows down time.
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So time is technically passing by faster on
a mountain top than at its bottom.
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This difference is close to nothing on Earth,
but if you could travel to a place with a
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super strong gravitational pull, like a black
hole, you'd see some remarkable results.
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If you move around it a few times, its gravitational
field would slow down time for you.
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You'd be away for many years.
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But when you came back to Earth, you’d still
look just as young as you did when you set
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on out on the journey!
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All this sounds theoretically possible yet
pretty hard to arrange in real life.
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But it doesn’t mean you should be sad that
you can’t travel to an alternate universe!
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In fact, you’re already in many of them
at this very moment!
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If the theory of parallel universes is true
– you’re making every possible choice
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you can all the time.
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And in this way, you’re constantly traveling
between parallel universes without even knowing
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it.
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That should make you feel at least a little
better about any bad decisions you’ve ever
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made!
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“Hey, at least Me #5,671 never took that
horrendous job I’d waste 6 years of my life
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at!
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Then again, he wouldn’t have learned so
much from that mistake!
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Always looking on the bright side!”
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With the technology that currently exists,
humans can’t see what’s beyond our observable
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universe.
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Meanwhile, physicists are looking for ways
to unlock the mysteries of the multiverse
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and prove the existence of parallel universes.
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They might even find gateways to them!
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In 2012, scientists at the Large Hadron Collider
discovered the Higgs boson – an elementary
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particle that gives other particles their
mass.
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Without it, atoms and humans never would’ve
formed!
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Scientists can’t see these particles yet,
but CERN, the European Organization for Nuclear
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Research, has announced their plan to build
a larger more powerful collider to discover
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those particles.
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According to particle physicist Dr. James
Beacham, if that doesn’t work out, then
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the plan is to go even further.
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They’d build a particle collider around
the Moon to reach energies tens of thousands
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of times larger than currently available!
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The next step would be building a collider
around the outer edge of the Solar System.
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However, even if scientists find evidence
that other universes exist, it’s still unlikely
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that humans will ever be able to interact
with them…
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But maybe in an alternative universe, they’ve
already found a way to exchange information
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and travel to other universes and times?
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Maybe that oddly dressed guy you saw on the
bus the other day is from another dimension!
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Kinda looked like Will Smith too!
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Hey, if you learned something new today, then
give the video a like and share it with a
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friend!
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00:09:42,300 --> 00:09:44,720
And here are some other cool videos I think
you'll enjoy.
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Just click to the left or right, and stay
on the Bright Side of life!
14447
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