Brian Greene and Sir Roger Penrose: World Science U Q+A Session 

one of the best things about this interview is that brian just let roger talk. he didn't just unneccessarily interrupt. long stretches of roger just talking. this is how it should be done.

How lucky we are to live in an age when we can listen to such ideas with just a click. Be Thankful.

I'm so lucky to be living in this era where big ideas could be available for free

I am 63, a biologist, and decided to learn modern physics and related math, and picked up The Road to Reality some 8 months ago, studying most of the subjects of math and physics mentioned in the book all along, and finished reading it now. I have learned a lot and feel great. But still when Brain says "general relativity can be derived from string theory", there is no way I can independently verify it, but I just have to believe that's the case. I am very thirsty of the real theoretical and mathematical details behind the physics talks. I have listened and watched physics talks a lot, and learned almost all of the physics stories by heart. What I really need is the theoretical/mathematical nitty gritty of those tales, the real equations and machineries that makes the physics work.

Sir Roger is amazing. I feel privileged to be able to watch and listen to our modern day Einstein.

This is hilarious that one of the smartest people in the world is so insightful regarding his mathematical background and that he is so humble. Roger Penrose is my hero! By the way, Brian, what a fantastic idea that you are making these videos available to the world. Thank you.

I can't believe I watched that whole thing but I couldn't stop. Amazing. Two of my biggest nerd crushes. Not only that but I understood 90+% of it, without a formal physics degree, which just goes to show what phenomenal teachers they both are. World treasures.

Unreal. This man is 90 and sharp as ever. Glad he lived to receive his Nobel.

​I thank the Big Bang for Roger Penrose. What a magnificent clump of atoms he is!

His profound thinking "Universe loses track of time --- when there is no mass" Is just fascinating. I was waiting for him to get Nobel Prize, and now that has come to be.

Amazing. It's not just a luxury to be able to listen to these conversations but I finally came to understand why Penrose is so relevant: he doesn't fear to think outside of the box.

I work in a totally different field, and I’m so thankful for World Science Festival and Brian Greene for making science this deep accessible! I’ve always been a fan of science and watching these videos keep me curious and awed. Thank you so, so much! - Rachel from the Philippines

These types of informative talks make the internet very special. Education at a click.

The MAN the MYTH the LEGEND. Penrose is amazing how he blends his ideas to unravel this space we interact with.

I think Mr. Greene did a fantastic job with this interview. His charm clearly made Sir Penrose feel quite welcome and properly respected. We won't have Sir Penrose around for all that much longer, I fear. And once he's gone, the access to first-hand testimony will be cut off. I believe that in hundreds of years from now, the people who are then living will see Sir Penrose as a giant of his time. And any and all biographical information -- especially straight from the horses mouth, so to speak -- will be greatly valued. Great job, Mr. Greene!

The best 2hours 53mins of my year. Thank you so much!!!!

I love watching Roger Penrose whenever I have a chance. Wonderful man and so much fun too listen to.

What a joyful talk🙂 Brilliant Brian Greene, kudos to you, this is one of the best interviews with the fascinating Roger Penrose👍

Of the many interviews of Sir Roger that I binged this week, this has to be my favorite.

IMO, Penrose is on the same level as an Einstien. This guy has made very significant contributions, it's mind boggling not that many people are aware of him.

Started Greene's book "Fabric of the cosmos", and could not stop reading. One of the best books about theoretical physics, written in a style that anyone can understand! Started Penrose's "Road to reality", and gave up after a few pages. I cannot understand most of the mathematics involved.

Thank you for making science so accessible 🙏🏻

I would say Brian Greene made this interview with sir Roger Penrose more impressive. Kudos for pointing out "all that matters" in his research.

this is my favorite a discussion between Brian Greene interviewing Sir Roger Penrose. Wonderful and glorious.

What a superb conversation. Roger Penrose is a rare treasure to humanity. I feel pure joy listening to his ideas and experiences. Brian Greene did an outstanding job of probing with excellent questions, and more importantly, truly listening.

Congratulations Sir Penrose. Thank you very much Dr. Greene - absolutely brilliant conversation.

It's been an absolute honour to watch two geniuses together explaining complicated things simplest way possible ❤️❤️❤️

Please bring back sir Roger penrose!! Perhaps less topics to cover but more in depth and detailed. Big thank you to everyone that made this meeting happen ❤️

Penrose is such a humble man .. I really like him.

I cannot remember a Nobel Prize that pleased me more than that received by Roger Penrose in 2020. I guess 2020 wasn't all bad.

That's very generous of them sharing their time and knowledge with us thank you both

it's incredible to hear him recount these dates and stories and hear him describe what that era was like and what the big mysteries were at the time.

New Zealand - just off to the pub, I’ll be watching this tomorrow (Saturday) morning. Cheers.

This is one of the best channels on the internet

Sir Roger's razor sharp memory at the age of 90 is just scary. The amount of knowledge his brain contains and can efficiently recall at will is extraordinary.

I just feel lucky and honoured for being able to listen to Sir Roger Penrose in my lifetime. I literally had a smile on my face throughout the whole conversation.

This. Was. Just. Brilliant! It is just such an absolute joy to see you two interacting. Sir Winston Churchill once describe Americans (meaning citizens of the USA) and Brits as two peoples separated by a common language. Not in this case. Your mutual deep understanding of physics transcends the normal vagaries and fog of semantic chaos. You guys GET each other. Your discussion of string theory was a profound testament to your mutual respect. This is why I love physics done by *_real_* physicists! 😎

Dear Mr. Green, your entity expresses such a unique form and rare specter in the art of communication so I have come to deeply appreciate your appearances discussing the different Universal mysteries and secrets. On the subjects You show respect and you are genuine. Your intellectual engages. Thank you for the time you take to share. A

Dr Greene nails it with humour and moderation every time.

Brian Greene always does amazing interviews

Thanks for bringing physics to those of stuck at home,. I listen to WSF/WSU discussion every single day. The presentations have enriched our knowledge at a time we need rational thinking in our lives. With much gratitude, thanks again.

It is a deep privilege to be able to see these great brains in action ! It is a major delight that I can convince myself that I understand some of it !

i read somewhere that intelligence is being able to make connections, and the most awesome thing about mr penrose is this predisposition to meddle in other people's business, and thank goodness. without doubt of all my heroes the tops. if only we all had parents and siblings who were interested in the sciences. i got lumbered with spiritualists.

Sir Roger Penrose is a delightful old Laureate. Brian Greene does a good job keeping Roger going. Thanks Brian.

Dr. Penrose is such a clear, clever thinker packaged in a very unpretentious personality. Now with the recognition that the Nobel Prize affords, I suspect he will be even more humble. No wonder he is a real hero in Physics for me. Dr Greene's questions are quite deep yet respectful; this interview is one of the very few that does not have the interviewer interview the interviewer. Well done , Dr. Greene.

It would be wonderful, if by chance, Sir Penrose's talk is subtitled. His mind still works in full throttle and sometimes it is hard to catch his emphasis as he goes through quick on these subjects. As a non-native English speaker I stumble there. This is a great opportunity to witness the focal points in modern science. Thank you heartily.

Two gentlemen who transcend national boundaries in order to bring the world and for that matter, the entire universe closer together.

Brian is great, makes the most complicated stuff easy to understand. A genius in his own right.

What a privilege to watch this video of a humble Nobel laureate.. Thanks, Brian Greene 🙏

Amazing how intuition build up and somehow some circumstances makes it working to solve deep questions.. Thank you Sir Penrose !

Thank you very much dr Greene for doing this, really appreciate the content so much , I can’t thank you enough

He's so modest that he doesn't make it totally clear that he and his father actually invented the Never-ending Up/Down staircase that MC Escher made famous in his drawings! Just after WW2, they happened to see an exhibition of Escher's works in Amsterdam and were impressed and excited, so on their way back to England on the train, they just came up with it. They published it in a psychology journal and sent a copy to Escher. Everyone (including me) thought it had been Escher's idea -- or was some ancient "paradox" -- but no ... Sir Rog & dad drew it first in the late 1940s, when Sir Roger was on vacation from university. Pretty bloody amazing, but an early sign of his absolute visual genius -- as well as mathematical genius!

This was cathartic to watch and listen. Incredible genius in Roger Penrose.

The more knowledgable about the universe an individual is the more humility and respect he has about our cosmos

I found that amazing, conformal geometry. Makes a lot of sense , Sir Penrose deserves the recognition.

I got to attend one of his lectures in person once, and even asked a question and talked with him. His lectures, with his hand-drawn layered slides, are great.

We always learn a lot from you Sir Roger Penrose. Thank you for all your lifetime efforts.

Impressive work, Brian. Kudos! Man, this Penrose guy is still sharp as hell!

it was a great publication. Grand master Sir Roger Penrose. And Brian Greene thank you so much.

Valuable time with Penrose. Its awesome

A sincere thanks for making this content free. Thank you so much. 🖤

Thank you Professor Brian Greene for communicating these subjects in layman's terms so that we can all understand the Universe we are all a part of. 🙂 👏 ✌ ❤

Sir Penrose, you have truly beautiful mind, let the stars guide you towards the anwser

I am in india and grateful for technology that we can hear this phenomenal man and also you Dr Green. God bless

Great interview. And it was nice hearing again about John Wheeler's work at Princeton on General Relativity. My brother was one of Wheeler's PhD students at Princeton and did some of the early work on black hole collisions... calculating the gravity waves emitted in the simplest case: two identical non-spinning black holes colliding directly into each other.

Love the synchronicity of you and Rodger relating to exam times. ...Nice you allow your students unlimited time to find solutions regardless of how slow they are.

" I'm slow but NOT stupid!", that is why he won the Nobel prize !

What a wonderful conversation. Especially the final arguments. It was profound. Just fantastic.

Awesome to be able to listen a conversation like this. And Brian Greene is such a great person to facilitate discussions. Edit for Timestamps: 02:09:15 Problems with Quantum Mechanics 02:29:12 Gödel's Theorem

Thank you for bringing the wonderful world of science to our lives. Sir Roger Penrose continues to be a light in our journey into the unknown.

Thanks to digital technology, I'm watching not only from a different location and time zone on this planet but in a different time in the future to the past when this was recorded. It's a pleasure to hear expressions of inquisitive minds. Thanks!

Well, that was just fantastic. Roger is full of wonderful, subtle and often hilarious anecdotes. Most interviewers don’t pick up on those and have the tendency to move on to the ‘important’ stuff. For me, it’s just the opposite. I love to hear what sparked those ideas, what the circumstances were, how he felt. Those things make a theory come alive. Brian, you delivered a masterpiece.

Thank you so much for this wonderful conversation. It felt extra special. Seeing the snow on the ground and the bare tree behind you Professor Greene is a perfect coda to this year's live streaming. Best wishes for the new year.

Yes these interviews are entertaining and informative but from a historical perspective they are priceless. Reading about theories is great. Hearing from the giants in the field directly about how they came to the theory is pure gold. Well done professor

Mandla From South Africa. I enjoyed this talk.

I worked all this out this my self, posted on youtube then I hear you Penrose suddenly worked all this out. I am so dubious of you Penrose.

Good job on the interview Greene. Don’t be too hard on yourself about Penrose not liking string. He enjoys the cowbell. MORE COW 🐮 BELL🔔

It’s so refreshing having such a prominent mind that isn't afraid to step on the toes of theoretical physicists who have wasted careers on String Theory. Penrose, despite his advanced age, isn’t stuck in dead end 90’s theories.

Brian is so gracious interviewing someone pissing on his life’s work. Love them both.

Does anyone feel like me that the reading voice is very soothing and it makes me fall asleep very quickly even though there are many new things I need to hear and learn?

Sardinia, Italy. Thank you for this amazing opportunity. Very grateful

Slightly late to the party, being as this was first broadcasted over a year ago. But I'm so glad I eventually got to see this important and imformative conversation. I've watched many Sir Roger Penrose vids. But this one is amazing, not only in depth and scope. But this video has a much more intimate feel to it and feels like a relaxed vibe, whilst also taking in incredibly important topics. A privilege to watch, from start to finish.

My two favourite people, At last together, thank you.

Months behind the curve here but great to see Brian's interview technique here. For such a normally good talker he spent an awful lot of time listening which was perfect.

Great conversation. With two great guys.

Thank you dear Professor Greene for giving us the opportunity to see and hear from the bests around the world.

Another Great session. Thank you Brian and Roger !!!!!!!!!! Fantastic subjects.

This series is great. I usually listen when I go to bed. Get at least over an hour of education and Brian style is fun also.. educational and fun, what's not to like. Thanks Brian. From a physics rookie

Congrats to Sir Roger Penrose for his Nobel prize!

His teachiñg, books and scientific works has enlightened the science community for more than 60 years

Greene is great at interviewing

Wow.... I'm grateful to the World Science Festival team :) Thank you....

Fantastic mind ! So vigorous and humble 👍

Dr Greene is not only a great physicist, an excellent teacher but seems to be a very humble person, paying deference to the Great man himself ie Sir Roger. What a difference between this interview and the interview Krause did of Sir Roger. Krause was busy doing all the talking instead of giving Sir Roger the space to talk.

Hey I am in NJ! I just saw this but i would have loved to watch at 9am lol. Thanks for these amazing videos 🙌🏼

He was 89-90 at the time of this interview. The intellect and mental sharpness is incredible!

Watching from Ukraine!

At first I thought all the attention being post-nobelprize was hypocritical. But now I see Mister Greene spent a wonderful amount of time on this great interview. My deep thanks.

This is holding up my preparation of MBA Lectures ... which suddenly seem horribly frivolous.

Sir Penrose is a perennial favorite, and the World Science Festival is required reading for my partner and I...cheers!