Brian Greene Hosts: Reality Since Einstein 

Hello, RU-vidrs. The World Science Festival is looking for enthusiastic translation ambassadors for its RU-vid translation project. To get started, all you need is a Google account. Check out Reality Since Einstein to see how the process works: ru-vid.com_video?ref=share&v=3EOpHHjv5g8 To create your translation, just type along with the video and save when done. Check out the full list of programs that you can contribute to here: ru-vid.com_cs_panel?c=UCShHFwKyhcDo3g7hr4f1R8A&tab=2 The World Science Festival strives to cultivate a general public that's informed and awed by science. Thanks to your contributions, we can continue to share the wonder of scientific discoveries with the world.

I love brian greene, he is the one who is inspiring me to go int o physics. I cant get enough of everything he does

It’s amazing that a mere 4 years later we have proof of gravitational waves and a picture of a black hole 😍 what’s next???

I don't mind admitting I have a huge man-crush on Brian Greene. He is such an incredible educator. He makes complex and seemingly boring subjects feel magical, joyful and funny.

Einstein was figuring all this out in his mind while people were still traveling on horses, discovering & understanding time dialation & length contraction by doing thought experiments, at a time when spaceflight was but a dream. Genius doesn't seem to do him justice, & it makes Newton & all those others even more astonishing when you consider how long ago they were figuring out all the different laws of the universe, when man's knowledge & scientific understanding was so limited, extraordinary mind's that one can but appreciate, marvel & envy. Bravo.

Up until 3 years ago I was familiar with Brian Green. Because of utube and Dr Tyson I became aware of two more. I am now familiar with six leading scientists that I can put into my lexicon of science . I am a 72 year old disabled Vet who is thoroughly enjoying the internet and the questions science is raising. Keep it coming guys...

Brian Greene is the best moderator of science discussions by an inflationary order of magnitude!😍

Dr. Brian Greene is one of the best! Thanks for all your hard work, Dr. Greene.

One of the best science speakers and an amazing personality, Brian Greene. So much respect to him. He’s one of those people who attract and make you view him as a role model even though I’m not in this “role model” concept overall. Like the Higgs boson that brings pieces together and makes mass matter.

this channel rocks

2 months after this video was published gravitational waves were detected. I love science.

Wish I d meet him once in my life, Dr.Brian Greene

i think i'm the only person here who likes these subjects too much without understanding anything at all.

I never realized this but Brian Greene is an excellent host! Very well handled when others tried to talk over others. Great talk!

I have never watched almost 2hrs clip on youtube sacrificing my night sleep...and I am taking Bachelor of Doctor of Medicine like what am I doing here...but I can say Physics has found its Spokesmen...The ones I can listen to....bravo Brian et al Much appreciation from Tanzania

What a fascinating discussion! I wish more people on this planet would listen to brilliant scientists discuss the natural world. As an aside, Brian Greene is an excellent host of these scientific forums. His ability to rephrase an expert's statements into more simple, less technical language is masterful. And finally, as a professor of psychology for 43 years, I have realized a passion for physics during the past 10 years. I just wish I could live longer to study this field in more depth. P.S. As we all know, gravitational waves have now been detected. How exciting is that!

I wish this group will sit together once more and talk about the same stuff , knowing that we now actually have the first pictures and scientific evidance of black holes and the ripple of time and space 😊

Hey guys! You have to invite over Gabriela Gonzalez again! Great speaker, explains beautiful, and was really enthusiastic at her time.

Man what a panel of guests.

i do not understand this complicated intellectual discussions but truly enjoying all of these incredible scientists talk

I could listen to Steven Weinberg all day. What an amazing intellect. I would love to take a class from him and can’t believe he is still teaching. I would love to know what he meant when he said that he doesn’t look at the pictures, they are misleading (or words that I interpret that way).

Prof Weinberg is such an eloquent speaker. Prof. Samir isn't far behind.

Her prediction about when the first gravitational wave would be detected was on point.

What an incredible line-up of brilliance!

21 people currently do not like physics. This was great, but most all of them are on this awesome channel. It's a damn shame this channels videos don't get millions, and even billions of views.

thank you science guys. These RU-vid videos really get people thinking and you never know where the next great ideas will come from. Hopefully programs like this will help to seek out the next genius to fill in some more of the picture. I'd love to be a fly on the wall to see what the next hundred years will bring

This was the best panel of WSF, everyone so down to earth and so lovely personalities 🌎

In this presentation, Brian Greene serves as the perfect moderator because he offers a style that contains both the academic scholar and the "close friend." He is highly credible, and he is always fully aware of his audience's needs. The panel consists of today's geniuses in their fields, and they all performed spectacularly. The content included a huge amount of important material. The visual technology and platform for this presentation is superior and it was sharply executed. This is rather lengthy as presentations go. However, this one holds your attention throughout. So, sit in a comfortable chair, open a good bottle of wine, and enjoy this presentation.

I cannot thank you guys enough for your uploads and channel. You have been a source of inspiration and knowledge for the open mind and to those who want to see the world differently, more beautifull. Thank you from South-Africa. One day I wish to sit in the audience 😉

She was right about receiving that signal using Ligo. Less than 5 years.

55:55 I come from the close future and we have finally detected the gravitational waves:):) Just as Einstein predicted This is just what the worlds needs a group of people all over the planet talking about science in a calm manner.

It gives me hope that Einstein and newton's legacy have not fizzled out but on the contrary, they are flourishing

Just in between 2015 when this was recorded and now 2019, the gravitation waves made due to two colliding black holes were detected and therefore proved and a photo of a black holes were taken. Such a wonderful time to be alive. Physics is so gorgeous and so exciting.

out of all the world science festival videos I've watched Brian Green is the best presenter by far. I wish the others were as organised and knowledgeable about the subject as him. The concept of getting someone in to host who doesn't know anything about physics is not a good idea in reality it just comes across as unprofessional and can confuse the listener.

Good to see Steven Weinberg doing so well.

I am definitely awed by science and would like to learn more. The presentations from the men’s festival are impressive. I look forward to presentations from the women’s science festival, which I assume is upcoming. For some reason, women’s explanations of complex topics are generally easier for me to grasp.

Brian Greene is not only very good at breaking down and explaining complex topics but at the same time very entertaining at it

Fascinating indeed!!! One of the few worthwhile videos in RU-vid that I enjoyed!!!!

Wonderful discussions. This group of scientists were particularly brilliant and stimulating.

I am still amazed on how many predictions General Relativity is still making.

Extremely inspiring video and people, thank you.

These are my role models and people I deeply respect for getting to the root of it all.

steven when he talks and closes his eyes BEST PARTS

I joined this year's WSFB, and with kind of hindsight when I watch this clip again, I see Brian Greene having appeared to be skeptical with the attempt to detecting gravitational waves. Interesting!

Brian makes these talks great with his interventions to clarify matters.

where are the subtitles??? I need to watch this and I need the subtitless :(

I want Brian to be my general physics professor in uni!

Does anybody know where I can find more in-depth information about the theoretical temperature graph of the background radiation, which comes up at 37:33 ?

Brian Greene is one of the most eloquent speakers I've ever heard on the subject of astrophysics. And his wit is an added bonus.

Fantastic discussion. Brilliant minds all over.

Outstanding presentation!

Brian is a genius love to watch him he's one of the smarter person in the world.

Wow incredible video and guests. Thanks you!

Thanks for the math and nice visualizations. It's really enjoyable to see all this videos. Feeding knowledge and curiosity, a productive replacement for my Netflix addiction.

Been so excited about this! And I'm actually privileged enough to study the physics of relativity at uni, this is so inspirational.

So this was 2015. Then a few months ago Weinberg’s wish of seeing a black hole was granted. Pretty mind-blowing.

I had a conversation w/ Dr. Weinberg about 25 years ago on the possibilities of quantum effects being responsible for "paranormal" events. At first, he was reluctant to admit that there might be a connection. After a half an hour or so, though, he did confess that it was not beyond the realm of possibility. Now retired, he is still one of the most open minded physicists that I have met. Though, perhaps not with all of his colleagues.

That's just amazing. I liked how Samir talks about the start of the universe was like a marble @35:00

Well, Lucky Gabriela, did not have to wait so long in the end for results from LIGO :-)

timestamps is a big deal for any long educational video. much appreciated.

I enjoy going back to these previous lectures knowing how much has been proven and how they arrived at the results. These are timeless by providing so much theory and applied comprehension.

I live only a few miles away from the Livingston La LIGO. It's a pretty dang interesting place if I say so myself. 😊

Einsteins mistake was him thinking that he had made a mistake - Steven Weinberg

Very informative and was gratifying to hear such luminaries on the complex topics.Thsnks to the organisation.The last comments left me puzzled yet.

Dr Weinberg is a pleasure to watch and listen to.

Thank you Samir. I was wondering why the entangled particles that fall into the black hole have negative energy.

Brian Green is an brilliant physicist AND a amazing pedagogue...this rare breed of scientists, deserves a Nobel price in my book.

It hit me when he was in an undergrad in college and bought Einsteins book and within “ a couple years he understood it.” I’m in my 40s and just now acquiring this knowledge. I’ve fretted away my youth….

This made my whole damn week !!! Thank you.

when Brian announced 2nd guest I heard "Erwin Schrödinger", I was like whaaaaaaaaaaaa.... oh

It wasn't _precisely_ that light will be deflected by a gravitational field - since Newton's math already showed that would happen. Einstein's calculations though, showed that the effect would be _twice as great_ which was the important difference.

What is the name and witer of the book Brian Greene showing on 6:59?

Great set of panelists and the new "two track" approach is a great improvement

next year she will come back! :)

Brilliant. Especially the last 40 minutes were fascinating and give me something to chew on. Some crazy ideas already popping into my mind, better keep them for myself. :-)

Where and when is this expansion accelerating? I hear it said that the further ack you look the faster the expansion. Then it would appear to be slowing as you come forward to the present? This I need clarification on.

It’s so wonderful that since this video was published two of the topics alluded to have been addressed successfully: we have confirmed observations of gravitational waves and we have the first image of a black hole!

59:20 "I think it s going to be in less than 5 years"... (took them 2 months! how beautiful...)

How beautiful is the current time w.r.t this video. We have detected gravitational waves, we have black hole image. Way to go Science!!

Physics definitely didn’t end with Einstein. Like all great thinkers before him and since, he opened far more questions than he answered

Einstein gave a glowing account of the Italian mathematicians who added insights to Riemann’s differential geometry.

Due to my stupidity i can not put into words the greatness of this video

@43:00 the picture of black hole ... Several years later we have a real picture of a hole

Great talk. I would really enjoy a discussion about the fundamentals in mathemathics, physics and philosophy -- the difficult problems at the point of the arrowhead: Inherent indeterminacy in axiomatic systems (leads to measurement problems in physics). Experimental data is pointing to an emergent reality. I would like to listen to new ideas about the metaphysical implications of quantum mechanics. I would even embrace very speculative ones, because strange -- coherently strange -- ideas should be considered at this point. Epistemology plays a very important role in how we define axiomatic systems conceptually (often underestimated). We need new ways of asking difficult questions, because the purely mathemathical picture of the universe seems to break down to the language of mathemathics itself as we probe deeper (This does not mean that reality is mathematics. It means that reality is idealistic, and we do not know how to deal with that -- because it implies that reality has some kind of purpose). I would like to listen to people who do not confuse the concept 'absence of anything' with the number zero. The concept 'absence of anything' is nonsensical when it is applied to physical systems -- and even in ordinary language. This confusion seems to be widespread. It leads to theoretical weirdness (Infinitely expanding 'nothing' described as 'something' etc.). I would also like to listen to creative ideas about how the observer fits into this picture. The C-word and quantum mechanics mentioned in the same sentence is not necessarily just semantics or quantum quackery. The act of mesurement: interaction between probabilistic fields, seems to have some fundamental significance (interaction presupposes an observer ... a point of determinacy). This means that reality is at least self-referential at the quantum level of reality (I am one of those 'crackpots' who still consider the possibility of teleological effects). I want to know what is going on there, because it seems to me that I am either crazy or that there is something everybody else knows that I just do not understand.

Absolutely brilliant discussion

I actually do have the same formulation of the Einstein field equations that they show at 19:00 tattooed on my arm :)

Always pleasure hearing brian greene.....

Ok it's official I'm a geek, loved it, loved the explanations and the graphics presentation.

5:06 .. "Prease" - I love Brian Greene, but I had to do it lmao

Consider the Big Bang as not being the origin of our Universe but the continuation of space time from another universe where Black holes with so much density actually rip through the fabric of space. There might be as many universes as there are galaxies in our own backyard. Philosophical and science fiction stuff in itself but hey no one knows what happens inside a black hole and did Hawkins not discover that black holes eventually evaporate.

and they detected the first gravitational wave 5 months after this ! Amazing ! Science Rules !

Thank you for a challenging stunning video. What an extraordinary universe we live in ...

fascinating to see this knowing that shortly after this, they did detect a gravitational wave at LIGO, and it was so much better, louder and less noisy than anything they could have hoped for. Must be extremely satisfying.

This comment board is full of people with no education in any relevant field critiquing the smartest people working on the most difficult problems in physics. If you're about to comment something negative, think just a few seconds longer about whether you have anything actually relevant to say.

Mr greene ur way of explaing is so nice ..love from pakistan

Its crazy to think that LIGO has recorded the presence of these gravitational waves (created by the collision of two merging black holes) for the first time

Is it possible for space to expand faster than the speed of light? I looked up the speed of the expansion but there was no mentioning of any limitations.

Its crazy how many models and theories come from Einstein's theory and equations. Sheesh talk about a legacy.

Dang I messed up. I walked through Harvard Yards every morning on the way to high school. Where am I now? Pfft working minimum wage stocking shelves.

What was the title and author of the book he spoke about right after the introductions?