Loose Ends: String Theory and the Quest for the Ultimate Theory

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Published 2019-08-03
Thirty-five years ago string theory took physics by storm, promising the coveted unified theory of nature’s forces that Einstein valiantly sought but never found. In the intervening decades, string theory has brought a collection of mind-boggling possibilities into the lexicon of mainstream thinking—extra dimensions of space, holographic worlds, and multiple universes. Some researchers view these developments as symptoms of string theory having lost its way. Others argue that string theory, although very much still a work in progress, is revealing stunning new qualities of reality. Join leading minds in theoretical physics for a whirlwind ride through the twists and turns of string theory—its past, its future, and what it tells us about the search for the universe’s final theory.

PARTICIPANTS: Marcelo Gleiser, Michael Dine, Andrew Strominger

MODERATOR: Brian Greene

MORE INFO ABOUT THE PROGRAM AND
PARTICIPANTS: www.worldsciencefestival.com/programs/loose-ends-s…

This program is part of the BIG IDEAS SERIES, made possible with support from the JOHN TEMPLETON FOUNDATION.

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TOPICS
0:00 - Introduction
3:54 - Program introduction
5:40 - Marcelo Gleiser introduction
6:26 - Unification of electricity and magnetism
10:30 - Unification of space and time
13:49 - Einstein’s General Theory of Relativity
18:38 - Standard model of particle physics
21:56 - Supersymmetry
26:14 - The Island of Knowledge
32:01 - Godel’s Incompleteness Theorems
34:27 - String Theory explainer film
37:07 - Michael Dine introduction
38:35 - Supersymmetry and the spectrum of particles
42:18 - Large Hadron Collider
44:57 - Extra dimensions of space
50:34 - Dark energy and multiple universes
56:40 - Progress since the 1980s and the future of particle physics
59:55 - Andrew Strominger introduction
1:00:53 - Einstein and black holes
1:03:59 - The black hole information paradox
1:07:30 - Stephen Hawking’s insights into black holes
1:12:00 - Using string theory to understand black holes
1:19:33 - Conformal symmetry
1:22:48 - Andrew Strominger’s view of string theory

CREDITS
- Produced by Laura Dattaro
- Associate Produced by Peter Goldberg
- Editing and Animation by Josh Zimmerman
- Music provided by APM
- Additional images and footage provided by: Getty Images, Shutterstock, Videoblocks, Event Horizon Telescope
- Recorded at NYU Skirball Center

All Comments (21)
  • Hello, YouTubers. The World Science Festival is looking for enthusiastic translation ambassadors for its YouTube translation project. All you need is a Google account to get started. Here is a link to Loose Ends: String Theory and the Quest for the Ultimate Theory so you can see how it works: youtube.com/timedtext_video?ref=share&v=YSWd21z2qq… All you need to do is type along with the video and save when done. Here is another link to check out the full list of programs that you can contribute to. youtube.com/timedtext_cs_panel?c=UCShHFwKyhcDo3g7h… At the WSF we want to to cultivate a world informed by science and inspired by its wonder. With your contributions you can introduce science to a whole new world.
  • @JohnSmith-dv5ek
    Brian Green has to be the best at explaining complex ideas. It's amazing how simple he makes it.
  • @sbh1311
    What we don’t know...we don’t know ....is such a profound insight....i am from 1950, and what an incredible ride it has been over these almost 70 years....how exiting to be alive ...and what a privilege to share in some of these incredible new discoveries and insights...the infinite intellect and talent out there is beyond understanding
  • @guywebber9312
    Love this format of 1-2-1...what a great discussion...Brian is so great as a (mega) knowledgeable host and allowing his brilliant guests to talk...it is truly inspiring and amazing to think we humans (at least some of us) know so much so far.. science is just so astounding...Thank you for bringing this to us, the general public.
  • As a business management student who has never had an applicable need to take science courses beyond the general requirements, these free lectures about the most important breakthroughs in science mean so much to those who are curious novices
  • @renupathak4442
    Wow Brian Green is no less than the scientists he is interviewing. His dramatic explanation of the string theory makes it so simple. Feel so blessed having all these great minds think for us. God bless
  • @phil3038
    Respect for doubting his lifetime works. Thats real science, the search for the truth and an open mind
  • @kjrunia
    I love this format. Well-produced introduction, for one. Also, in this conversational way, the interviewer can focus on the quality of the conversation instead of the distribution of time among a panel of participants. I bet that’s exactly why you decided to do this. Also, I LOVE an interviewer who is an expert in the field and is quite aware of the interplay between them, their guest, and the audience. They will know what to ask to guide both guest and audience to a truly informative and enjoyable conversation. ‘Lay’ interviewers tend to - sometimes understandably - interrupt too many times as they didn’t know what to ask in the first place, only to realise halfway their guest’s answer they should have asked something else first, inadvertently halting their guest’s train of thought, only to interrupt for a ‘let’s go back a step’ question. So... I love this. Well done!
  • @iknowitall2546
    Listened to this 30 times! Absolutely fascinating and so informative. What a great format! More of these Brian please!!! Less is more! Too many physics debates with too many participants. This was simply superb!
  • @bnjm8868
    Andrew Strominger perfectly describes a black hole through string theory, the best explanation I have ever heard. I might add that strings of quantum physics make up the walls of a black hole which defines the wormhole which is empty or hollow, allowing information to fall through it into extra dimensions. Information is not contained inside a black hole but merely passes through it.
  • @tomaaron6187
    Top notch. Great the way Brian pulls ‘me ‘, the non physicist, into an intelligent conversation instead of dumbing things down. It’s reminiscent of the high standards of Scientific American back in the 1950’s and 60’s. It's a positive that there’s a ravenous hunger by an educated public for ‘more’.
  • @Dr10Jeeps
    I love these World Science Festival talks and Dr. Brian Greene is an exceptional host/moderator. Coupled with the presentations by the Royal Institute, I spend half the night as an enthusiastic listener.
  • @duliomatos
    Wow, so many years ago I've read Marcelo's and Brian's books and by chance got into this video, so great when physicists are devoted to further the interest in physics and science
  • @katiekat4457
    It’s time for The World Science Festival to get little side tables or something suitable for their drinks. Drinks on the floor should be beyond them by now. Great discussions as always. And of course, a superb job done by Brian Greene and the entire World Science Festival.
  • @rhmcvay
    Love the update on String Theory. Especially Brian's illustration of String Theory for those new to the subject.
  • I really enjoyed the third conversation with Andrew Strominger, he seems extremely passionate about his work and has very respectable ideas, fantastic video
  • @MrTradisrad
    I like the epistemological undertones of this ...I often muse on the chance mathematical descriptions of reality speak more about our desire to communicate ideas and our sapen inclinations for pattern recognition and the need to bend nature into descriptive terms
  • @kwisclubta7175
    So good to hear from Bob Balaban about string theory. I had no idea he was such an expert.
  • @user-cl8zj8hn2d
    Understanding compex things in simple and easy way is the art of genius. Brian Greene is creating environment to understand everything scientifically and eliminating superstitions .