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Physicist Brian Greene Answers Quantum Physics Questions
Theoretical physicist Professor Brian Greene joins WIRED to answer the internet’s burning quantum physics questions. Is String Theory dead? Is our universe the only universe? What happens after the universe dies? Answers to these questions and many more await on Quantum Physics Support. WIRED recommends: Watch more from WIRED | Tech Support: #BrianGreene #Physics #StringTheory…
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Yes, Physics Says You Can Run Through a Wall
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@adams0020
August 4, 2026 at 5:21 pm
The editor sure had fun labeling the timestamps lol
@Sawyer-x9n
August 4, 2026 at 5:22 pm
If Brian Greene ever sees this, I just want to say thank you.
Earlier this year, I became interested in physics. I read many books on the subject, and then I discovered Brian Greene and started watching interviews with some of the world’s greatest physicists.
I’ve learned so much thanks to the incredible value and knowledge you’ve shared with the public.
Thank you so much. ..
@KhaoticComrade
August 4, 2026 at 5:57 pm
bot
@Koooo4
August 4, 2026 at 5:27 pm
12:19 You can tell by his answer that he has personally invested a lot of his career into string theory and is very desperate for it to not be a waste of time lol
@martinth972
August 4, 2026 at 5:51 pm
Brilliant scientist but his answers have all been so dumbed down this video is essentially misinformation and nonsense.
@pnjodaro
August 4, 2026 at 5:55 pm
Wired, PLEASE make more videos with Experts in different fields. I absolutely love it and I don’t wanna run out of content 😭 Thanks for doing this
@k_a_bizzle
August 4, 2026 at 5:58 pm
Seeing Brian Greene do the infamous pencil-through-paper explanation is now checked off my bucket list.
@obaz91
August 4, 2026 at 6:26 pm
MY KING. MY MUSE. MY CRUSH. MY PRECIOUS LORD. BRAIN GREENE. <3
@Little_moz
August 4, 2026 at 6:30 pm
Wow, I just realised how time dilation would sound to people who don’t understand what it is 😂
@LoveOPugsley
August 4, 2026 at 6:33 pm
You can think about Heisenberg’s Uncertainty Principle much like the special order menu that you find in certain Chinese restaurants where you have dishes in column A and other dishes in column B, and if you order the first dish in column A you can’t order the corresponding dish in column B; that’s sort of like the Uncertainty Principle.
@uncletiggermclaren7592
August 4, 2026 at 6:43 pm
Physicists explaining *Block Theory* : “To start with, Just give me these ten assumptions as if they are axiomatic. I can’t prove them, but I assert them. OK ?. Ready ? THERE, I proved it !. Everything is predetermined !.”
@keaton718
August 4, 2026 at 6:53 pm
10:40 it’s important to note with the double slit experiment, it may be an electron before it’s fired and when it lands, but it travels as a wave, and in fact an electron *is* a wave so the electron waiting to be fired is a localised wave and when it’s fired through the slits it is a spread out wave, so with a spread out wave fired at two slits you should expect an interference pattern. With all the variations on the experiment, like the 2000 atom sized molecule where the interference pattern is also seen, that molecule is also a “matter-wave” in transit. Y’all are all being lied to about what this experiment is meant to show and some pop physicists seem happy to let you believe the lie.
@BalloonMerchant
August 4, 2026 at 7:02 pm
Assus Reamus made me laugh 3:26
@seeitfixit
August 4, 2026 at 7:05 pm
You guys got the wrong Brian.
@timz9862
August 4, 2026 at 7:22 pm
It’s amazing to me that people like Isaac Newton, who lived hundreds of years ago, could make calculations and predictions about things that we still know our true today and they didn’t have any kind of computers. I think computers are actually making people dumber.
@TheSkinnyZ
August 4, 2026 at 7:54 pm
Omfg! 2:09 I asked more or less this exact same question to my physics teacher back in the day and ever since I occasionally think about the possibility of falling through my bed while sleeping. 😂
@TimBee100
August 4, 2026 at 8:01 pm
Science fiction.
@ronaldocost4
August 4, 2026 at 8:18 pm
I didn’t understand anything, so, according to science, I’m on the right path.
@TimBee100
August 4, 2026 at 8:22 pm
Extraordinary claims require extraordinary evidence.
@Wowreally42
August 4, 2026 at 8:26 pm
Can we get a 4 hour long part two? Please and thank you
@TheOutdoorVoice
August 4, 2026 at 8:26 pm
My theory combines aspects of particle theory and string theory. I believe an electron produces ripples that radiate outward through spacetime, similar to waves spreading across a pond. The frequency of these spacetime ripples may determine the amount of mass the particle can possess. One way I think this idea might be demonstrated is through the double-slit experiment. When a single electron is fired toward two slits, the ripples surrounding the electron could pass through both openings and interfere with one another on the opposite side. The electron itself would then follow the resulting spacetime geometry created by that interference.
@OrnellaRodriguez
August 4, 2026 at 8:38 pm
<3
@alef_19
August 4, 2026 at 8:45 pm
Te amo Brian ❤
@lowbudgetmic
August 4, 2026 at 8:46 pm
Hard science 🧬 😮😮😮
@maxbrilliant72
August 4, 2026 at 8:53 pm
I didn’t listen to what he was saying. I just talked to ChatGPT the whole time.
@fretzl
August 4, 2026 at 9:19 pm
physicists’ interpretations of schrodinger’s cat are so much more varied than how he presents it here as an undisputed fact. like literally just look at the wikipedia page. that felt so poorly answered
@sinematographers3344
August 5, 2026 at 1:59 pm
The comments reveal a large Brian Greene appreciation and warm sentiment.
If he was to write a book titled “Making love with Brian” i would be the first to make that purchase.
@randallpetersen9164
August 5, 2026 at 2:14 pm
His wormhole ‘discussion’ was wholely inadequate, unimpressive, disappointing.
@djmixamor
August 5, 2026 at 2:21 pm
what a joke 😂😂😂😂😂
@randallpetersen9164
August 5, 2026 at 2:26 pm
The block universe creates a massive existential crisis because, if real, it completely eliminates the illusion of free will.
What you did was always going to be done, and what you’re going to do, can’t be changed.
@Scixxy
August 5, 2026 at 2:27 pm
That north pole analogy is great! I feel better now!
@randallpetersen9164
August 5, 2026 at 2:29 pm
Love he won’t admit that string theory is dead, but then says that everything about it is untestable. Brian, you should know as well as anyone, if it’s not testable, it’s not science, it’s fantasy.
@randallpetersen9164
August 5, 2026 at 2:33 pm
The only thing quantum computers will be used for is breaking encryption and causing extreme chaos around the world. You know this is true, why not just admit it?
@randallpetersen9164
August 5, 2026 at 2:44 pm
He should have discussed how relativity may vary depending on the region of space under consideration. Timescape cosmology. Standard model need not apply everywhere.
@ethanhetzler2767
August 5, 2026 at 2:45 pm
So how can he claim that observation/measurement has such a big effect on a system and what it does without knowing how the system behaves without observation
@randallpetersen9164
August 5, 2026 at 2:49 pm
It’s got to be frustrating dealing with some of these questions. Come on, people! Physicists aren’t deities.
@Zardwark
August 5, 2026 at 2:50 pm
I’ve read a good few of Brian’s books and they are very good. But it’s always bothered me the early universe was a black hole, then it wasn’t. because of Voodoo.
@IncoGnito-ji5du
August 5, 2026 at 3:43 pm
What about the other colours of Brian?
@durantan2343
August 5, 2026 at 3:50 pm
my brain hurts watching this
@danielstone869
August 5, 2026 at 4:11 pm
Science: I choose you Pikachu. Brian Greene: Who’s Pikachu? Internet: Me: You are, Brian Greene. To be clear, you are. 🐣
@rassman48
August 5, 2026 at 4:22 pm
However, the universe is vast, there are few places you can get to that would be useful. So even if there is such a thing as a wormhole outside of a black hole where time and space are warped, then these are very unlikely to be a means of travel that could ever be used.
An AI version of my response is
“Even if wormholes exist in nature, the conditions required to make them stable and traversable are far beyond anything we can achieve. And because the universe is so vast, any naturally occurring wormhole would likely connect to regions that are inaccessible or useless for travel. So while wormholes are mathematically interesting, they’re very unlikely to ever become a practical means of transportation”.
@paullenoue8173
August 5, 2026 at 4:56 pm
As a test of how much I understood quantum physics, I paused the video after the questions, thought up an answer, then played the video to see how much I got wrong. Ended up getting all them in a range of 50% to 95% correct. Cool!
@Mainestreamer
August 5, 2026 at 6:09 pm
That analogy with the bending paper is irrelevant. How would someone bend all sace and everything in it.
@rossbooth4635
August 5, 2026 at 6:54 pm
I’m going to have to steal his analogy that asking “what was before the big bang” is equivalent to asking “what’s north of the north pole”.
@angrycandy5441
August 5, 2026 at 7:13 pm
Spoilers: Wormholes don’t exist, no matter how many pencils we poke through paper.
@zzrr933
August 5, 2026 at 7:36 pm
For me he’s the best science communicator
@subtlefeatures1087
August 5, 2026 at 8:01 pm
Joe Rogan just had Andrew Wilson on……..Could have had this dude.
@matthewjuhlin4628
August 5, 2026 at 8:24 pm
Wormholes totally exist. You just need negative energy. Like half a universe’s worth.
@briangoldberg4439
August 5, 2026 at 9:05 pm
Oh no. He’s a string theory nut.
@droouu
August 5, 2026 at 9:05 pm
This is the greats series. WIRED also manages to get the perfect people.
@danesthesia09
August 5, 2026 at 9:17 pm
Big up to Wired, and big up to this gentleman. Both my parents were college professors, and this man’s INCREDIBLY DEEP comprehension of his science and clear dedication to making it non-insultingly understandable would make them proud.
I’m glad I spent my time on this YT video, and that is a rare event for me.
@David-r9e3w
August 6, 2026 at 9:24 am
QM classicalised in 2009 Forgotten Physics website uncovered the hidden variables and constants and the bad math of Wien, Schroedinger, Heisenberg, Planck, Einstein, Bohr, Bohm and Penrose and all the rest including ‘Brain’. Shameless clueless pretenders.
@zeeboy87
August 6, 2026 at 9:34 am
Carbon cosmic melanin 666 neutrons protons and electrons creation of everything
@jeffwashburn73
August 6, 2026 at 9:53 am
So I am immortal. Nice.
@brianfunaki2602
August 6, 2026 at 10:45 am
Professor Greene – How does it feel to be a physics Superstar? You post a Q&A and one day later over one hundred thousand human beings have watched your video to learn science but more importantly to try to figure out how it all began and the purpose of existence (if there even is one). By the way when does your next book come out? 🙂
@FarhanaLovie
August 6, 2026 at 11:07 am
Maybe time needs an observer? Without an observer time can’t be counted.
@BasBleu02
August 6, 2026 at 11:22 am
When I listen to Prof. Greene, I feel as though my grasp of quantum mechanics mirrors Schrödinger’s poor cat. It’s alive, no it’s dead.
@cristinapopescu3639
August 6, 2026 at 11:34 am
What clicked for me better than the piece of paper analogy in understanding wormholes was a video of a river with a whirl with one end on a side of the bridge and the other on the other side o the bridge
@skullpoker69
August 6, 2026 at 12:00 pm
You got the crackpot to do this? String theory is the only game in town because it’s only a game. Next time, get someone who does actual science.
@edpolax
August 6, 2026 at 12:28 pm
If 8.3 billion people all simultaneously bump a wall at the same time for X number of times, would that increase the probability of atleast one person to pass through the wall?
@MarkDeAutremont-g3e
August 6, 2026 at 12:53 pm
Your opinion on hybrid bond crosstalk?
@Zado19
August 6, 2026 at 1:23 pm
This guy is alright on Startalk when Neil and Chuck are there to rein him in and follow up, but here im lost. These feel like quarter answers patched together
@KevinWendigo63
August 6, 2026 at 1:28 pm
18:00 The concept is actually much simpler: Schrodinger had two wives. Each had a cat. Schrodinger found a way to get rid of both cats.
@intraum
August 6, 2026 at 1:45 pm
you can put a pencil through folded paper, but can you jam with the console cowboys in cyberspace?
@tb.abad9091
August 6, 2026 at 2:14 pm
7:19 But then everything changed when the fire nation attacked.
@TheOnlyName
August 6, 2026 at 4:03 pm
The thought that before The Big Bang maybe nothing ever happened is crazy to think about
@Liammac1878
August 6, 2026 at 4:45 pm
“String theory”
“Enormous strides”
Atta boy sheldon
@jamielacourse7578
August 6, 2026 at 5:08 pm
I like Brian. I don’t sense any arrogance like some other scientists.
@reymisterio1386
August 6, 2026 at 6:03 pm
I could listen to.brian greene and Neil Degrasse Tyson all day and never get bored
@MitchRaemsch
August 6, 2026 at 6:25 pm
Einstein stopped believing in wormholes as they violate local causality. Bells Inequality has a missing link that demotes them as evidence for action at a distance. QM overlooked it. QM tunnels? You can’t see a particle you can’t see one tunnel. They are also non local aether order Einstein never believed QM.
@KayN1989
August 6, 2026 at 6:33 pm
The absolute best 25 minutes of my life
@fallios
August 6, 2026 at 7:20 pm
Please Brian Cox
@gravity_lover
August 6, 2026 at 7:29 pm
ending the video on a high note i see
@PP-ky2ji
August 6, 2026 at 8:26 pm
They dont
@WTIM-TV13
August 6, 2026 at 8:53 pm
A straw would be a better example of a wormhole than a pencil.
@simon199418
August 6, 2026 at 8:58 pm
This guy needs to do something more meaningful with his life. Like for example, reading to the elderly. But not his books, something they might enjoy.