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String Theory, Multiverse, and Divine Design – Brian Greene

Alex O'Connor | October 4, 2025



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– VIDEO NOTES

Brian Greene is a professor of physics and mathematics at Columbia University, director of its centre for theoretical physics, and the chairman of the World Science Festival. He is best known for his work on string theory, especially in his book “The Elegant Universe”, which turns 25 this year.

– LINKS

Buy The Elegant Universe (affiliate link): https://amzn.to/43ELeWX

– TIMESTAMPS

0:00 – What is String Theory?
7:41 – Can We Prove String Theory?
15:21 – What Would Einstein Make of String Theory?
16:41 – Is String Theory Scientific or Philosophical?
21:58 – Does String Theory Predict a Multiverse?
28:33 – Does Science Explain or Describe?
39:18 – What Are “Laws” of Physics?
46:02 – Is There Intelligence Behind the Universe?
54:05 – Brian’s View on Purpose
56:43 – Is There Any Evidence for the Multiverse?
1:05:31 – String Theory, 25 Years Later
1:08:35 – Does String Theory Matter in Practice?
1:11:58 – What is Time?

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Written by Alex O'Connor

Comments

This post currently has 31 comments.

  1. @FaizAhmed-iz3qd

    October 4, 2025 at 7:42 am

    To my understanding Time has 4 dimensions. Three of them are same as space and one is motion( equal to speed of light). Time is the property of this universe. Einstein named it spacetime. That sounds like time doesn't exist beyond this universe. In a black hole Time dilation can happen all the way up zero only. Time can not be negative that means it has a positive arrow. Time is must for life. It's just super hard to put it in a definition but everyone can feel it passing by.

  2. @Koukiworld

    October 4, 2025 at 7:42 am

    Guys Quit beating around the Bush
    Golden Ratio which is the Solfeggio frequencies MOVES EVERYTHING Yes. Throw dust in the Solfeggio frequencies and watch it form to life. Planck energy moves us all in the melody of Golden Ratio ✨️ 528hz Love ❤️ 😍 Now Start making equipment and gadgets to strat using Planck energy to power our Houses, cars and everything ever needed on Earth 🌎 in a Cup of Coffee of Planck energy you can run your🎉 country 😀 😄

  3. @CoreyCG

    October 4, 2025 at 7:42 am

    what if time is just one of our senses, because i feel like i can work on my sense of time and change it, just like how i feel, what i hear smell ect, just a thought

  4. @disillusionize

    October 4, 2025 at 7:42 am

    Disorder goes back to order in the larger scheme of things. Glass breaks, it can be further broken down, it becomes silica, then it becomes a chip and you might have it in your phone. Or it may become part of your body through the food you consume. So it is reversible. Rather recyclable. Only it goes through its own general to quantum moments.

  5. @CPlusPlusDev

    October 4, 2025 at 7:42 am

    Atheism is the one emotional position that hides behind science.
    After doing MSci Physics i see that there is only a designer can explain why the universe exists.
    Appealing to many universes is just a hiding tactic.
    Have many universes doesn't hide God it only shows that God can create as many universes as he likes.

  6. @ashlittle4545

    October 4, 2025 at 7:42 am

    I remember first seeing Brian on stage with other scientists, he spoke so well that I thought he was the presenter.
    Turns out he’s an elite tier specialist in the field of pioneering scientific research. My money is on Quantum Physics personally.

  7. @familyshare3724

    October 4, 2025 at 7:42 am

    "The arrow of time is wrapped up in entropy." 1:10:00 This just passes the confusion from one word to another. Entropy is the overwhelming tendency of random change to destroy toward dust rather than create gems, useful batteries, working engines, or free lunch. Whether random in this direction or that direction, random change tends towards equilibrium (dust) not order (like a charged battery). The math of two particles and one event can go both ways. But the math of multiple particles randomly interacting tends to go one way: equilibrium.

    Only by presupposing a creator god or blind faith that "time is a thing that can be reversed" and super-determinism (god's plan) could one believe that dust will randomly tend to form useful working engines.

    Time has one direction because random change has one tendency (entropy) in any direction.

  8. @pigrocket

    October 4, 2025 at 7:42 am

    "If it solves certain key problems, if it advances your understand of black holes or the big bang, then it absolutely falls squarely within the realm of science."

    Doesn't science need observable proof?

  9. @wrathforged2179

    October 4, 2025 at 7:42 am

    Im not that smart… Like really. But somehow these guys can explain things so enthusiastic and fairly simple that even i can follow along, realize and understand things. Thank you so much for these videos and interviews!

  10. @michaelbariso3192

    October 4, 2025 at 7:42 am

    If the ticks of the clock slowed as relativity suggests – the rate at which time flows you slow the speed of light, gravity, atoms, planets rotations and speed in solar systems, galaxies cosmological expansion, the wind, birds, animal and human heartbeats, automobiles, airplanes but relativity must be true because our cult leader is a genius. When Einstein's disciples are confronted with the facts that disprove Einstein's relativity, they pretend they don't exist aka pseudo-stupidity-pretending to be stupid to avoid the reality that everything they've ever believed in science was just a fairytale. Einstein's disciples are unable to spot the illogical pseudoscience in Einstein's relativity "hiding in plain sight" because they've been indoctrinated with an alternate reality belief system of fantasy physics, like watching a science fiction movie and believing its real. As long as people haven't been brainwashed with relativity for too long non-autistics instantly see the mindless nonsense, even more so if they're not marijuana users as the substance causes schizophrenia psychosis making them more susceptible to thought reform-brainwashing. Einstein's disciples will never admit they were fooled or even questioned relativity they'd rather pretend to rationalize insanities; this is the very mindless groupthink mentality that perpetuates the ignorance seen in cults. Ignorance is not knowing and doing, stupidity is knowing and doing anyway.

    Cosmological redshifts show no expansion when measured in a transverse (side-to-side) direction only in a line of sight not perpendicular to each galaxy proving light is not traveling and the big bang doesn't exist. Like any explosion it expands in all directions duh. Newsflash: some galaxies are blue while others appear red-like, it doesn't necessarily mean its redshift from a great big Badda Boom. Lovesick Einstein's disciples hate me because I point out the illogical contractions in science. They hate the Space Cat almost as much as Jesus or Trump

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