What If The Universe Runs Back To The Big Bang?
This isn’t the first time you’ve watched this video. It might be your 100th, or your 100 billionth time. You see, the Universe has stopped expanding. No more stretching the fabric of spacetime. Nope. It’s shrinking. And it’s going to shrink until all space and time collide into a singularity smaller than the Like button on a YouTube video.
And after that, there’s a real chance it inflates outward again, in the same way a star goes supernova, exploding after collapsing in on itself. Giving birth to a new universe. You’ve heard of the Big Bang. Well, this would be a Big Bounce. And this may have happened already, trillions of times – with you right in the middle of it. So. What exactly happens if the Universe starts shrinking?
Check out DESI observatory’s YouTube channel: https://www.youtube.com/@DESISurvey
00:00 What If The Universe Starts Shrinking?
01:12 This is The End
04:51 Redshift & Hubble’s Discovery
06:53 Is Dark Energy Weakening?
09:02 The Math Behind the End of the Universe
09:01 The Lifespan of The Universe
10:59 The Return
12:41 Galactic Collisions & Escalating Heat
14:19 The Final Countdown to Singularity
16:51 The Big Crunch
17:21 The Big Bounce & Cyclical Universes
Ever wondered what would actually happen? Explore our biggest What If scenarios
and go deeper with the What If community 👇
📘 The What If Book: https://bit.ly/WIFBook
📝 Articles: https://whatifshow.com/
─────────────────────────────
JOIN THE COMMUNITY
─────────────────────────────
💬 Discord: https://discord.gg/Bj5UnspbwE
📲 WhatsApp: https://whatsapp.com/channel/0029Va8VC502ER6r1yk1yP2Y
📸 Instagram: http://bit.ly/whatif-instagram
🐦 Twitter/X: http://bit.ly/whatif-twitter
📘 Facebook: http://bit.ly/facebook-whatif
─────────────────────────────
SUPPORT WHAT IF
─────────────────────────────
👕 Merch: https://bit.ly/shopwhatif
❤️ Join this channel for exclusive perks: https://www.youtube.com/channel/UCphTF9wHwhCt-BzIq-s4V-g/join
🙏 Patreon: https://www.patreon.com/whatifshow/membership
─────────────────────────────
MORE FROM UNDERKNOWN
─────────────────────────────
🧠 Aperture – Philosophy & Psychology: https://bit.ly/aperture-show
🆘 How to Survive – Survival Science: https://bit.ly/how-to-survive-show
─────────────────────────────
📩 Brand partnerships & collaborations: contact@underknown.com
Produced by Underknown: https://underknown.com
#universe #science #space #whatif #cosmos #simulation #reality

@LucasDue-f9k
August 3, 2026 at 10:44 am
L😂
@kamikeserpentail3778
August 3, 2026 at 10:44 am
Well that might just explain Deja Vu.
Or that could just be misfiring memory synapses, since we recreate our memories each time we recall them rather than actually pulling them from somewhere.
@bushwookieadventures
August 3, 2026 at 10:44 am
Big Bounce????? Dont you mean Big Crunch?
@light564
August 3, 2026 at 10:44 am
So what happens to the black hole that's left. Does it get ripped apart too? What does the black hole collapse?Even further, or just get sucked into the singularity
@PenadoX3
August 3, 2026 at 10:44 am
Quadrillion'th time actually ☝️🤓
@droneworld2312
August 3, 2026 at 10:44 am
Load of crap we really don't know anything, it's all guess work, anyways by the time anythingnhappens we will all be long dead humans will not exist which is a good thing, that another reason if their are aliens they don't want anything to do withnus we are a joke
@neilmclellan24
August 3, 2026 at 10:44 am
So wait, i have lived this life 100 billion times, A.thats unlucky and B. Wheres my loyalty card 😂
@catheraxx
August 3, 2026 at 10:44 am
the universe expands and contracts like a heartbeat via a big bang
@taiidan1
August 3, 2026 at 10:44 am
The funny thing is a few years back me and my sister was talking about this thiroy the bounce
@abiangara5462
August 3, 2026 at 10:44 am
Holy Quran says universe will shrink back to where it started(Singularity)
@BatmanTheHomie
August 3, 2026 at 10:44 am
Bro your thumbnails and video tittles are always hilarious 😂
@justdude7222
August 3, 2026 at 10:44 am
The big bounce is my favorite theory 😁
@DarkScienceDocumentaries
August 3, 2026 at 10:44 am
The problem is not that a Big Crunch is impossible. The problem is that this video stacks speculation upon speculation until it sounds like an established scientific prediction.
DESI has not discovered that dark energy will disappear and gravity will pull the universe back together. It has found tentative, model-dependent hints that dark energy may evolve. The claim that the universe has a 33-billion-year lifespan comes from one particular theoretical model that assumes an underlying negative cosmological constant. That assumption was not measured directly.
The video then makes several additional leaps. Evolving dark energy does not automatically mean a Big Crunch. A Big Crunch does not automatically produce a Big Bounce. A Big Bounce would not automatically recreate the same galaxies, Earth, people, or YouTube videos. The universe would also not collapse toward a central location, because the universe has no physical center.
So the idea that you may have watched this video 100 billion times is not a conclusion produced by the DESI data. It is science fiction created by taking one uncertain observational hint, selecting one speculative model, and piling several unsupported assumptions on top of it.
Interesting idea? Absolutely.
Evidence that reality endlessly recreates the same version of you? Not even close.
@zenebeabrha9913
August 3, 2026 at 10:44 am
God made the universe
@zenebeabrha9913
August 3, 2026 at 10:44 am
Because if it exploded how did it explode when there is no gravity in space
@zenebeabrha9913
August 3, 2026 at 10:44 am
But the big bang theory is not real
@imjpoi9717
August 3, 2026 at 10:44 am
Is my first bruh
@Signa-w7x
August 3, 2026 at 10:44 am
Always came up with something mindblowing😵.
@kizzyfn9375
August 3, 2026 at 10:44 am
i feel like the 5th dimension has a play in this.
@RyanBrii
August 3, 2026 at 10:44 am
So the amount of speed the edge of the universe is increasing is exactly like a waterfall.
The closer to the edge you go, the faster the water get's pulled. So basically, at the edge of the universe somewhere, there's an edge where galaxies are falling or being pulled by something.
I 110% believe it's a black hole many times the size of our Milky Way galaxy.
@MohammadAli-q8r8v
August 3, 2026 at 10:44 am
You don't know , but we know . The quran said that 1400 years ago. Here are some of them:
Expansion of the Universe – Surah Adh-Dhariyat (51:47)
"And the heaven We built with strength, and indeed, We are expanding it."
Creation of the Heavens and the Earth – Surah Al-Anbiya (21:30)
"Have those who disbelieved not considered that the heavens and the earth were joined together, then We separated them, and We made from water every living thing."
The Universe Was Like Smoke – Surah Fussilat (41:11)
"Then He turned to the heaven while it was smoke and said to it and to the earth, 'Come willingly or unwillingly.' They said, 'We come willingly.'"
Seven Heavens – Surah Al-Mulk (67:3)
"He created seven heavens in layers. You do not see any inconsistency in the creation of the Most Merciful."
The Sun and the Moon in Orbit – Surah Ya-Sin (36:40)
"Each is floating in an orbit."
The Sun and Moon Follow Precise Calculations – Surah Ar-Rahman (55:5)
"The sun and the moon move according to precise calculation."
The Sky Protected – Surah Al-Anbiya (21:32)
"And We made the sky a protected ceiling, but they turn away from its signs."
@almostsomebody3478
August 3, 2026 at 10:44 am
We will never know. Faith is the best we have come up with so far. Crazy to think where is the beginning of everything if its a loop? What started the very first bang or loop etc…
@whitneymease9859
August 3, 2026 at 10:44 am
NoNooooo i’ve been waiting for so long until 2027 and now this has officially been announced😢😭😭😭😭😭😭😭