Brian Greene Explains That Whole General Relativity Thing

Theoretical Physicist Brian Greene explains how the universe works using a water bottle and disco music.

[@stiimuli]

I love that Stephen seems genuinely interested in promoting science and intelligence.

[@AngeliaChanel]

+stiimuli I was thinking the same thing! He doesn't sit and only talk to useless 'celebrities' night after night after night....ugh!! I love this show :)

[@Gess575]

+AngeliaChanel Good point!!!

[@makdavian3567]

+stiimuli Yeah! He even brought out a special wagon for scientists! He is *AWESOME!*

[@goggletoggle1294]

Wouldn't you?

[@stiimuli]

Goggle Toggle Unfortunately, many aren't. Including many tv hosts and youtubers.....and Texas government officials.

[@ClwydEnComu]

Bloody love that Stephen puts science and non-cinematic arts right up there at the front of his show, brilliant host. Wish we had more emphasis on culture and knowledge in general media.

[@rock-tk1qf]

Marry Him

[@3.0.1.02]

@@rock-tk1qf shut the hell up imbecile

[@megametagrossard3342]

@Stimulator7 well isn't America one of the most progressive , sanitary and educated place in the world ? .... In terms of corruptness I could name a few places worse than it ......

[@davel7037]

@@megametagrossard3342 America is no best anymore, scientific culture is actually better outside US

[@hugodesrosiers-plaisance3156]

The mouthful basically means that everything always actually moves in a straight line - gravity doesn't **attract** anything, rather, it is able to warp that straight line into what we call a curve.

[@NerdSyncProductions]

7:12 I need much more of this on tv!

[@CosmicNerdStudios]

yes

[@CosmicNerdStudios]

this is the last place i expected to see you here

[@NerdSyncProductions]

Cosmic Nerd Studios I love Stephen Colbert! Gotta support other South Carolinians!

[@CosmicNerdStudios]

+NerdSync oh

[@goggletoggle1294]

No syncing please.

[@QuantumBraced]

I like that he has scientists and inventors and leaders and other intellectual celebrities in. How cool an idea to honor Einstein and special relativity!

[@OrigEntertainmentOfficial]

+QuantumBraced I agree. Stephen leads by example. Celebrating smart people creates heros of them. Our society needs to honor intelligence more.

[@tonyatthebeach]

+OrigMedia or it needs to ONLY honor intelligence and not useless 'celebrities'

[@gia257]

+tonyatthebeach its society, intelligent people dont have to be social, while celebrities must, ofc there are people that are everything though :P

[@tonyatthebeach]

+gia I'm everything! :P I just need to make sure everyone knows it?? ps. good point

[@Rugbystu14]

QuantumBraced it's good to have such honorable people since most of the time there's only bimbos around.

[@cjpatz]

“Space time is a four dimensional Hausdorff Differential Manifold on which a metric tensor is imposed that solves the Einstein Field Equations, and that metric tensor gives rise to geodesics and objects that are not experiencing any other force move along the geodesics described by that metric!” Holy crap that was a mouthful!

[@BURDYMAN777]

Thank you kind sir. I was hoping someone would have it typed out so I know how to spell it lol

[@cjpatz]

Holt Burdette haha! No problem, I think another guy did it though too, but I didn’t notice it till I spelled the whole thing out. Wish I had known! Lol

[@thegreath.sapiensapien6907]

ITS all about metrics there is nothing real. the universe is a hologram

[@joashmathew7454]

Umm sir, we only talk English here.

[@Nautilus1972]

@@thegreath.sapiensapien6907 Source?

[@dangleason9023]

Finally a phrase to tell the general public how little they actually understand.

[@bryandylanweast8766]

Yeah i wish it wasn't A issue and we had a way to come together

[@brandocv]

Humbleness is the first step to enlightenment.

[@omarsabih]

@Justen Wennerberg It's way more than a bunch of scientific names, whole fields of knowledge and whole bunch of theories and techniques were referenced to. I have a PhD in Electrical engineering, and I have only a very surface-level idea about these things. These are not easy stuff.

[@jamiejohnson4246]

You think you know till the end 😆

[@iridium8562]

@Justen Wennerberg for a physics major, your comment hurt my soul

[@Pfromm007]

Albert Einstein says that space-time is a four dimensional Hausdorff differential manifold on which a metric tensor is imposed that solves the Einstein field equations, and that metric tensor gives rise to geodesics, and objects that are not experiencing any other force will move along the geodesics described by that metric! *throws punches*

[@bluesrockfan36]

+Arkadiem Hausdorff not housed :p

[@1ucasvb]

+Arkadiem Also, tensor, not tenser.

[@Pfromm007]

+1ucasvb Thanks guys, sorry if my misspellings made you feel tenser.

[@freerangeorganiccrystals7913]

+Arkadiem It's the most concise, non-dumbed down explanation of relativity that I've ever heard.

[@alexanderreynolds9705]

+Arkadiem no _or_ between Hausdorff and differential

[@pablocastellanos8461]

"The ONLY rapper Eminem is too afraid to diss"

[@Chill2094]

I FUCKING LOVE that Stephen is sharing science knowledge with us !!!

[@samspamable]

His name is right there, and still...

[@PolishNomad95]

+Carl Rice He also has another documentary series called The Fabric of the Cosmos. I highly recommend it.

[@imperialviking2817]

+Tr4cK17 Look up a show called Space TIme here on youtube.

[@Microtherion]

Yes, I'd recommend the (PBS) Space Time channel too. I've been watching it quite a bit lately, with the result that I actually just about understood what Brian Greene said at the end there. And I'm no Sheldon Cooper, so they're clearly very effective videos. :)

[@dizzy-117]

I just love, when someone is hyped about something. I'm not that much into science myself, but if someone starts to tell me about something science-related and he just seems as happy as this guy, I'm really starting to get interested.

[@dizzy-117]

+Xeno Fractal sorry, not a native speaker...

[@hellomynameisCECIL]

+DizzyDC its all good. Science is sick though.

[@SilentscufflE]

+Xeno Fractal Everyone knew what he meant. Talking about the commas rather than the content is just pedantic and insulting.

[@vonbraunprimarch]

+Patrick Foley edgy

[@ighfee]

That's me every time my nephew asks me a science question.

[@danielsmith1202]

I love Brian Greene soo much. He’s so passionate and seems to love teaching, he’s like a kid with a new toy. We need more reverence of figures like him and not celebrities that contribute nothing to society as a whole.

[@lucyravenclaw1790]

He looks a bit like Einstein if Einstein didn't have mustache 😃

[@shannonlyonsmurphy4617]

Meanwhile Jimmy Fallon is spitting water on celebrities.

[@facelessandnameless]

right???? lol

[@goggletoggle1294]

Colbert holds himself to pretty high standards.

[@KazenoniKakuremi]

+shannon lyons murphy and gets massive views....what a society we live in....i'm still hoping that those are all paid views and society hasn't just embraced idiocy

[@OrigEntertainmentOfficial]

+shannon lyons murphy To each his own. I love both guys and Jimmy Kimmel. We live in a great time for comedy. Lots of different flavors.

[@84chevypickup]

+OrigMedia some taste like shit, so i dont consume them. like jimmys childish comedy...

[@duncanwallace7760]

The end was fantastic. So good to not dumb things down!

[@totallynotthefeds]

I'm glad Academics are getting more shine, so we can stop making stupid people famous.

[@Ian-rj6fq]

Agreed. Case in point the stupid host.

[@eliehaddad4244]

Well said brother

[@maengun2091]

Stupid people? Intelligence is relative too.

[@-lll-ll-llll-AVE]

You can be stupid and highly entertaining, just as much as you can be highly intelligent and boring as heck.. I think we can agree Late Night shows are best for highly entertaining people, and once in a while they happen to be intelligent too

[@PoplarForest]

But muh sports beat yer sports!

[@astrog7361]

Newton: I'll leave it to the consideration of the readers Einstein: Hold my moustache

[@swamypalani3100]

Omg I laughed so hard lmao

[@shubhankardasgupta4777]

What you say???

[@TheZod00]

*Hold my trampoline

[@ehaitem]

These hold my shit comments are getting old and annoying

[@astrog7361]

@@ehaitem ok then

[@daedalus_00]

I'm really glad that Stephen asked for the technical explanation. It was truly beautiful jargon.

[@dimitriosdesmos4699]

Daedalus my foot.

[@silverfox1754]

That 30sec explanation took me 3 years and a degree in physics to understand 😂

[@somefreshbread]

Only three!?

[@damfadd]

see.... you tube!

[@philipsarpong8301]

You are a genius ... majority wont understand in a life time ... Guess what, there must be physics teacher that don't understand it. They only reproduce it for their students to figure it all out by themselves.

[@sayedaayan3169]

Ahh finally I have a life goal now. I wanna understand what he said

[@davidmudry5622]

9/11 question... Do you know why a feather and a bowling ball dropped in a vacuum from the same height at the same time will reach the ground at the same time? The answer is because while in free fall they both weigh exactly the same, zero weight, and there is no force acting on them. So where did the weight and the force come from to destroy the twin towers when all of that weight was supported for 30 years? The NIST answer --> "Since the stories below the level of collapse initiation provided little resistance to the tremendous energy released by the *falling* building mass, the building section above came down **essentially in free fall**, as seen in videos"...But free fall means not **falling**, and it also means no weight, and no force. --> kzbin.info/www/bejne/e2WWXnacqtB4ndU

[@johnnyregs2378]

If anyone hasnt read Dr. Greene's book "The Elegant Universe", i cannot recommend it enough. He is able to explain the most radical nuances of quantum mechanics, string theory, theoretical physics and so on in the most beautiful, simple and thought provoking ways. Him, Michio, and the great Brian Cox are truly the stewards of the highest forms of sciences today.

[@justayoutuber1906]

Brian Cox on Joe Rogan's show was great

[@artimp152]

String Theory still does not function. It is a waste of time. Feinman lectures are better, more entertaining, and do not pretend to more knowledge than we have - but do support quantum theory whose calculations work.

[@bobjones5869]

@@artimp152 i’m going to bet that you just heard string theory was bad from a youtuber and are regurgitating their opinion and that you don’t have a degree or any experience with physics

[@EHS611]

I did read his book The Elegant Universe. I also watched his 11 hour lecture on General and Special Relativity. To his credit he takes complex ideas and make it understandable to a lay person, who is not good in Mathematics, like me.

[@johnnyregs2378]

@@EHS611 I also watched that lecture, I was amazed at how engaged I was throughout the whole thing. The understanding I had coming out was awesome. He's a true educator.

[@ashwynn4177]

Wow that stopping of water flow of dropped bottle is the coolest thing I've seen. Just that one short demonstration opens up a whole vista of understanding!!

[@davidmudry5622]

Question, is saying "dynamic effects" in this NIST document the same as saying "dynamic weight"? My understanding is that objects falling "essentially in free fall" would have very little weight of any kind with respect to their "static weight", or any falling objects that do not "slow" as they fall, can only have a maximum weight of a "static weight"? Am I right or wrong? NIST WTC Towers FAQ 31...? Quote word for word... "Since the stories below the level of collapse initiation provided little resistance to the tremendous energy released by the falling building mass, the building section above came down *essentially in free fall*, as seen in videos. As the stories below sequentially failed, the falling mass increased, further increasing the demand on the floors below, which were unable to arrest the moving mass." "In other words, the momentum falling on the supporting structure below, which was designed to support only the static weight of the floors above and not any dynamic effects due to the downward momentum, so greatly exceeded the strength capacity of the structure below that the structure below was unable to stop or even to slow the falling mass. The downward momentum grew larger directly proportional to the increasing falling mass." Now can you envision a falling bottle that falls faster and faster and at the same time the water squirts out harder and harder? This is what the USA government is telling you happened on 9/11.

[@MeltedToast84]

You've never seen that before?

[@ashwynn4177]

@@MeltedToast84 No

[@janasiaprice9278]

i truly love how everyone is just 100% invested into this. makes me happy. 😁

[@gurpreetsingh793]

52 people loved this sooo much they turned their phone upside-down to like it again!

[@samishi2811]

Gurpreet Singh Matharoo no they didn’t

[@gerRule]

They’re called flat earthers

[@dvk7277]

Gurpreet Singh Matharoo. Lol good one. But sadly reality is that these people are flat earthers and they need this dumbed down farther.... to say a pre-born.

[@jonathanchow3401]

Gurpreet Singh Matharoo I liked your comment so much I liked it twice

[@wafulamasikaAbbottjesselove]

IM STEALING YOUR JOKE

[@lesgame1671]

People like this gentleman here are the real celebrities of the world!!😉

[@tanmoytarafder8655]

We need this more on TV!

[@sarthakbiswas2201]

Absolutely

[@brennbeez]

"it's up to you man, go nuts." Is that what the gods look like when they're creating universes?

[@OriginalPuro]

Hint, humans are gods and no one created the universe, it happened.

[@viveklakshman2897]

Puro, I sometime have this similar thought that God could be the evolved and transcended collective human consciousness in future and we are just it experiencing it's past through the flow of what we call time! But the trouble is, as always, what came first! And the cycle goes on!

[@crocopix]

No sir, God is flat earther.. he created the earth with four corners.

[@eleethtahgra7182]

Well, the gods were bugs bunny n friends from loony toons, so....yeah.

[@ishworshrestha3559]

Ok

[@bradleybindle6428]

Wow, he really does have the best guests.

[@alanramirez7123]

Brian Greene is leaving a great legacy of trying to encourage more awareness of science to the public. Great guy

[@seanp4644]

I'm actually really happy that Stephen asked that last question, now I have more Wikipedia pages to read xD

[@del_1523]

My first thought after I heard the answer

[@tharengore7215]

Yea I was like ok I need to look up what all that is and means. I like Colbert brings in science professors and even ask them not to dumb it down but challenge us to understand.

[@TigDegner]

My thought too, and my greatest hope is that he did that recognizing the world of resources at the everyman's disposal today. And what do you know, a few comments up someone's typed it up so you even know how to spell everything right. Now let us go, and learn and make merry!

[@crimsonstrykr]

BTW one thing to note - the explanation using the rubber sheet is misleading and wrong in many ways. It seems to assume relativity is only about space being affected by mass and shows nothing about time. I am not gonna explain all that here but if you wanna know why check out Veritasium's video on relativity.

[@HelloWorld-ev9sg]

@@crimsonstrykr I agree with you. It is not entirely wrong, there are just better ways to demonstrate the theory.

[@DrummerRF]

FINALLY. I've been saying this for a while, I want smart people not to be cool by explaining this simple but by showing how incredibly difficult it is what they did and FINALLY someone gives the opportunity for people to take a peak in the mind of scientists and see how much work it is. I LOVE IT.

[@shkotayd9749]

I should have known that bottle example would do what it did, but was that ever cool seeing it in action. That was awesome! He is REALLY GOOD at explaining stuff like this :D

[@Mrwiseguy101690]

The teacher's example: 4:28 The homework: 5:30 The exam: 7:14

[@KrappyPatty-ry6lj]

Indian schools: teacher's example: 4:47 homework: 0:14 Exam: 7:14

[@EtertainmentNet]

cleverest utube comment

[@JithinJacob333]

So fucking true!!

[@arshdeep550]

Trojan Pegasus +1 😂😂

[@petermarkwood9077]

O m G

[@mariokarter13]

From what I've heard about Einstein's personal life, there must have been stiff competition for the "happiest thought of his life."

[@GoldenB101]

+mariokarter13 yeah, Stiff competition

[@mariokarter13]

Miles Hayford He definitely worked hard to come to that conclusion.

[@AperturePowered]

+mariokarter13 You guys should be penalized for those.

[@abogotar]

+mariokarter13 It must've been hard, but he certainly rose to the occasion.

[@mariokarter13]

Evan Thomas I'm sure there's a loophole I could squeeze through.

[@thereisnospace]

PBS Spacetime. Awesome channel, has a wonderful playlist on general and special relativity. GO NOW!!!

[@edgeofthedanklord2263]

No u

[@ricardoviking1993]

Ur mom space

[@deeb3272]

Watched this a bunch of times and Brian Greene still amazes me. A very wise science communicator

[@DoableSteve]

The falling water bottle was an awesome way to demonstrate the equivalence principle. Brian Greene mentions very quickly that the curvature in time as well as space is important and doesn't go into it more, but he means something like this: the rubber sheet represents spatial curvature and you can slice spacetime so you have many copies of the rubber sheet stacked together. Moving forward through time forces you to move upward through the stack, but the *true* time direction you experience gets pulled slightly inward by gravity, so your overall motion arises as the combination of both space AND time bending toward the sun.

[@shcxatter2]

Steven Kapturowski Holy shit, thank you for that comment! It made me think deeper into the problem, and I think I finally got it! So basically, it's like time is just another spacial dimension, in which we are moving with constant velocity(which we preceive as time passing by) at all times, and the curvature, which mass produces, extends into the future(which is basically just a direction if we consider time as a spacial dimension), and the fact that objects with mass get drawn into that curvature is due to that constant movement in time!

[@Thunder_Dome45]

Space time is freaky.

[@jmcsquared18]

It's even stronger than that. The overwhelming majority of the acceleration we experience towards the earth - and everything experiences towards everything else - comes from the curvature in time specifically, not of space. Spatial curvature contributes to more exotic effects like lensing and black hole dynamics.

[@MrFlameRad]

@@jmcsquared18 exactly I was just going to explain that. For the most part, gravity is just matter bending space so that relative to spacetime curvature, you're actually not moving through space at all but only through time when you and another object of mass accelerate towards one another. If we could think in four dimensions these concepts would be so easy and kindergarten level intuitive, but unfortunately we're stuck in our boring 3D 🙄

[@jmcsquared18]

@@MrFlameRad Being stuck in three dimensions kinda sucks sometimes, but that's why it's fun to imagine :)

[@devonmiller636]

Brian Greene is the rock star of physics.

[@IronMan-qi3yg]

Devon Miller nope that's Brian Cox

[@davidhall7540]

wow .

[@TheJaker5]

Devon Miller there’s another Brian of physics. His name is Brian Cox. He also has a great way of explaining this stuff to people who have difficulty comprehending it.

[@jarintasnim2130]

Yes he is

[@Hahduyban]

And so is Brian May.

[@frede1905]

Brian Greene is really, truly amazing. During quarantine, he had a video series on KZbin called "Your daily equation", which meant that every day he posted a video where he explained some physics equation so that we all could understand. In this way, he would connect us all while we were at home. Every friday, he even had a live stream where we could ask him about anything regarding science. In this way, I was even able to ask him about a few things 😀

[@skjameelakhtar]

Thank you for mentioning the series..... I really appreciate it buddy. ❤

[@davidmudry5622]

But Brian Greene said the water is squirting out the holes because gravity is pulling down on the water. "Since the stories below the level of collapse initiation provided little resistance to the tremendous energy released by the *falling* building mass, the building section above came down **essentially in free fall**, as seen in videos"...But free fall means not **falling**, and it also means no weight, and no force. --> kzbin.info/www/bejne/e2WWXnacqtB4ndU

[@ronharleypantaleon1824]

Wow! Thank you so much!

[@rafazeppelin]

Great guest.

[@sanaljith727]

When my mom walked in I immediately switched to porn cause it was easier to explain.

[@SRVarma1993]

Underrated comment 😂🤣

[@RSBLMC92]

@@SRVarma1993 copied comment.. ^^

[@munkeybutt]

G-string theory

[@user-tp5qu7zu2l]

@@RSBLMC92 wtf XD

[@Deeznutz93738]

Hold Up 😱

[@CatCaretakerID]

I love Brian Greene - he explains these complex things in a way I can almost always understand. I thoroughly enjoyed his books.

[@mengistumayardit1805]

The best demonstration I've ever watched on the General relativity theory. Thank you!

[@SerenitySong6]

I love Stephen for always giving so much time to science

[@notwhoyouthink2415]

Teacher: the physics exam will be easy The exam: 7:13

[@ZeHoSmusician]

Exam change: you have to recite what Brian says between 7:13 and 7:32; you have one week to learn it! \m/ :)

[@hemanthvarmas]

common late show team, You have to pin this comment.

[@DasnarkyRemarky]

The advantage of having a smart host is that a lot of smart people get invited and get asked a lot of smart questions. That demonstration would help many laypeople get an understanding of how exactly gravity works.

[@christinacho4370]

If only every teacher and professor of science was this exciting and passionate!

[@carlosmohedano]

The passion he speaks with is so contagious 🙂

[@naota3k]

"So Albert Einstein says that space-time is a 4-dimensional hausdorff differential manifold, on which a metric tensor is imposed that solves the Einstein field equations, and that metric tensor gives rise to geodesics, and objects that are not experiencing any other force will move along the geodesics described by that metric." In case you wanted to look anything up. ;)

[@tofu-munchingCoalition.ofChaos]

@@guptadagger896 The "line with a double point" (two copies of the real number lines identified except at the origin) is a differentiable manifold but not Hausdorff.

[@micky100]

The last part is pure flexing by professor Greene 💪

[@sachin3446.]

Einstein after reading newton books on gravity be like "hold my beer"

[@spacewitchvulcan]

*papers

[@-_Nuke_-]

More like "Halte mein Bier" as he was German XD

[@ianrussell1095]

*beer slips from hands and falls to ground without spilling until it crashes in to floor* Einstein: This gives me an idea....

[@muhammadwaqar3406]

Or "hold my photons"

[@jarredt2655]

He didn't drink so....idk

[@jithunniks]

7:12 Woah, that was a badass explanation

[@mjremy2605]

A good teacher is always understood by others. This example made the whole concept clear as a bell for me. I got it!!! Thank you Dr Greene, and Stephen! A very good visual demo for both topics. Excellent!

[@alexyan7245]

7:12 That's a moment cap says to tony stark: speak english.

[@toasternfriends3329]

Yup, except of course that Tony Stark was just making shit up and Greene isn't!

[@Happy-xi9hl]

Wasn't he speaking in english already?

[@nanonkay5669]

Professor: **says something no one absolutely understands** Audience: 👏👏👏👏👏👏👏👏 Story of my life in college

[@spacewitchvulcan]

"Absolutely no one" would structure a sentence that way. Are you sure you're in collage?

[@dadokh790]

@@spacewitchvulcan English is not everyone's native language.

[@aikerd9]

@@spacewitchvulcan Technically his sentence was still correct, since nobody _absolutely_ understands general relativity and physics. Honestly though people make mistakes. Not every sentence gets typed out perfectly, sometimes we make errors in spelling and grammar, and sometimes we just have a brain fart and type some stupid shit. So I personally try to avoid correcting anybody on stuff like that. The only time I really "correct" people is when they are spreading lies or misinformation, because that bothers me far more than somebody mixing up "their/there/they're" or something else along those lines.

[@marcosabias6664]

@@spacewitchvulcan Next time you're correcting somebody, make sure you're not misspelling *college* .

[@kristofferlodesjo5781]

You didn't have to clap, you know?

[@jlmer616]

Please continue to have scientist on the show. Brian Green is a Star amongst nerd circles.

[@Tyrant604]

7:13 “that’s the good stuff right there” 🤤

[@bijoythewimp2854]

"Stand back Issac, Alby's here"- that was so 😆😆😆😂😂😂😂😂😂

[@ShubhamShubhra]

I really love Stephen for actually asking Dr Greene to say that at the end. Brilliant stuff.

[@MikhailFederov]

It was rehearsed

[@kevokoma]

can anyone tell me the episodes where he interviews or has guests that aren't celebrities(basically people who will waste my time)? This was informative and I'd like to see more.

[@gnrld]

You'd be surprised as to what kind of insights some of the celebrities actually bring to the table. They're not all just eye candy and gossip.

[@Jakecmuir]

+kevokoma Yeah most celebrities are celebrities for a reason especially actors who have honed their craft to a phenomenal and mind bending level.

[@jimy5752]

+kevokoma You should watch the one with Pewdiepie. It will change your life. His best guest so far.

[@pierzing.glint1sh76]

+kevokoma you dont want your time wasted, dont watch a comedy show you plonker

[@spderweb]

+kevokoma Pretty much every episode, he does the Daily Show style routine, has a celebrity, and then has a political person, or science person on. it's a mix. He basically turned the late show into The Daily Show.

[@coldmoonlight6361]

3:31 Colbert nods to confirm the fact that Greene earned that applause.

[@randyjoble4607]

stephens a hell of a host

[@makarandnidhalkar7139]

Very good thought to invite such wonderful brains to the show and spread the knowledge in enjoyable way. Great show. Thanks.

[@mbyard356]

Thank you, Stephen, for promoting intelligent education. 🤓

[@armaniac661]

Brian Greene is awesome! I love his documentary on String Theory!

[@chriskindlesparger1163]

Brian, you did a great job explaining something so intricate such an elegant way. Hats off to you

[@ridethegradient]

"let me just lean into my ignorance of what your saying to me"-- We should all be so bold.

[@Tommyhillpicker]

Hey if you guys want to understand more about how special and general relativity works, how humans' thoughts on the matter have evolved with the work of Einstein and other key scientists, or if you just need more examples to try to really wrap your head around a lot of the concepts, check out the Space, Time and Einstein course at www.worldscienceu.com. Brian Greene does a really good job, and the courses do a great job at making these mind blowing things relatively easy to understand.

[@MrPutamaia]

Tommyhillpicker how about you go and fuck yourself! I tried accessing your shitty adress and all i found is some crap for register for the courses and shit like that.

[@feynstein1004]

@Den Ax Dude, Well, all you have to do is register for a course. But it's completely free. And the series on special relativity is the best I've ever seen.

[@wc447]

We need more of this in prime time and late broadcasts

[@sevgi6026]

4:03 that single dude that started clapping XD

[@pikkuadi]

He grew... grew, grew, and grew grew up to be.. grew up to be A badass scientist called Brian

[@kabirkhan456]

1:55 Newton : I will leave it to the consideration of the reader. Einstein : I got this one, stand back Isaac Albie is here 😂😂😂😂

[@vjmadhudath9482]

"So Albert Einstein says that space-time is a four-dimensional differential manifold on which a metric tensor is imposed, that solved the Einstein field equations and that metric tensor gives rise to geodesics. And the objects that does not experience any force moves along the geodesics described by that metric" So that's what it is...

[@theresonly2genders857]

AKA everything moves in a straight line but gravity just warpw that straight line into a curve.

[@crimsonstrykr]

@@theresonly2genders857 tut tut, you missed the most magical part of the explain there m8! You see its MASS that bends the "space-time" or the coordinate system leading to straight lines coming together leading to the phenomenon of massive objects attracting each other. You see, according to Einstein, there is no gravity! Its all from the bending if space time!

[@jc.maccount5945]

Oh i love it, this is remarkable promoting science to the people

[@pradhyudh]

He is the greatest science explainer i seen

[@eleethtahgra7182]

We need more of this, so that the general public could be more scientifically litterate.

[@praneshpandey1531]

I really wish if my science teacher would have been like Brian greene

[@appex77]

I'm so glad I clicked on this. That experiment was epic

[@ionfeld]

7:38 "That's the shit right there" saying it while pointing at the science guy!

[@creacher2620]

Holy shit, I’ve come along so far in my physics career I finally understand what brain said. I saw this when I was an undergrad and didn’t understand a word of what he said in the end.

[@lorisperfetto6021]

It actually hits differently when you know what a geodesic is

[@jacobesplin9301]

Newton: I leave it to the consideration of the reader. Einstein: hold my beer...

[@ws-zo3kp]

Einstein: hold my apples

[@davedee6745]

When the happiest thought of your life is a guy falling off of a house, you got a problem. Einstein needed to see Freud about that.

[@rianakanthi6752]

😂😂😂😂

[@neerajsivastava1630]

Seriously we need this types of teachers in india who focuses on imagination and visualisation

[@ncdfan]

Drop a beat for Brian next time, that ending was some mad e=mc squared type shit!

[@feldmarschallg]

SO. FUCKING. AWESOME

[@davidmudry5622]

Brian Greene makes a BIG MISTAKE @ 4:26 when he says, "the water no longer pours out the holes because gravity is no longer pulling on the water while in free fall." General Relativity says gravity is not a force, it cannot push or pull on a mass. He should have said the water stops pouring from the bottle because he is NO LONGER PUSHING UP, accelerating up on the bottle.

[@nmarbletoe8210]

yes you say it better

[@davidmudry5622]

@@nmarbletoe8210 Here is a celebrity scientist Brian Greene, and he is saying gravity is a force when he says gravity is pulling down on the water. Einstein said the opposite, weight comes from an upward force not a downward force. kzbin.info/www/bejne/joPVYp6XjbB1qbc

[@yvettekosta-jv4bx]

Isn't there also different pressure inside the bottle as outside it, making the water squirt out, and when he lets go, it's movement causes space/time to push the water back, or rather it pushed on the bottle and water equally? Because he is no longer counteracting it by lifting the bottle?

[@stval]

Where are the christmas greetings on the fabric of time?

[@saucybackport]

+Saint Val fabric of time, contrary to a cup of coffee, proves that christ is just a fairy tale :P

[@Damstraight68]

+Saint Val Along the geodesic of the next video.

[@adaoantunes0]

+Xenial Xerus Christ was real. God is a invention of humans. And Christ being son of God is Literature.

[@fhaddad3]

+Xenial Xerus the only fairy tale who people like you love to believe is evolution

[@mkely9032]

+fhaddad3 Better pretend those flu injections work forever. Someone else who has been dumbed down by religion.

[@fisikalectures597]

4:22 just like to appreciate the beauty of physics in that very exact moment. Notice how he was twisting around the cap, adjusting it? That's because if the cap had been closed too tightly, then there wouldn't be any atmosperic pressure acting on the water due to the air on top of it. In other words, the water would not have "fallen" out of the holes. By adjusting the tap, he is making sure that there is pressure acting on the water, almost "squeezing" it so that the water would come out of the holes. Physics is everywhere gents...

[@DAVOinIN]

Mmm.... Not really what he's doing but that's alright. He's just ensuring that a vacuum isn't created inside the bottle. No "pressure" being exerted on the water from the top.

[@kyzer42]

@@DAVOinIN That's exactly what Fisika Lectures said.

[@btslittlemixarmixer1654]

3:31 -stephen be like - yeah man,I am like that...lol😂

[@Egyptiangamer77]

your comment deserves my reply ahahhahahhahah

[@btslittlemixarmixer1654]

@@Egyptiangamer77 thanks!

[@tortolexie3891]

Brian Greene is now one of my favorite persons to exist ever.

[@shivendhania7724]

Well, that's why I love Stephen Coelbert more than any show He don't make people eat cow toungue or chicken testicles He literally gives us the Knowledge we need

[@davidmudry5622]

But Brian Greene said the water is squirting out the holes because gravity is pulling down on the water. "Since the stories below the level of collapse initiation provided little resistance to the tremendous energy released by the falling building mass, the building section above came down **essentially in free fall**, as seen in videos"...But free fall means not **falling**, and it also means no weight, and no force. --> kzbin.info/www/bejne/e2WWXnacqtB4ndU

[@PrateekSaini]

4:40 even while falling water was still feeling gravity as it was still falling. it's just that we couldn't notice because there was no relative motion between bottle and water. Gravity is always there.

[@shaghiliftekhar9896]

I think i just threw something off the edge of the universe😂

[@rohaanmuzaffar3187]

i understood the last phrase and i havent even started uni...being asian certainly has its perks

[@adamkarr3218]

tool

[@piratessalyx7871]

Excellent job by you Brian! Keep teaching us, we need it!

[@eliyanology4046]

james corden: thank you brian greene for helping me go to work by driving you on the other late late show

[@Ash-cg9bi]

Colbert had to... HE HAD TO... ask that last question Couldn't he have just ended the segment there and not make us all feel like unevolved humans(apes)

[@Thetruthiscosmic]

So study, go learn about it, evolve yourself.

[@Aditya-nw3ni]

1:58 Stand back Issac!! ALBY is here!!!😂😂😂😂😂😂

[@theduder2617]

7:32 Who else had a flashback of graduate level physics courses? It also made me realize how old I am. lol

[@timhulsizer]

From the title I expected Brian Austin Green to explain physics to me. I'm simultaneously disappointed AND relieved.

[@andresguty]

Perhaps the guy know something after being married to Megan

[@EctInc]

+Channel T Well since simultaneity of events does not exactly apply to Special Relativity, you're good :)

[@travisparkinson3075]

+andres gutierrez wrong Brian Green.

[@MeadFan]

7:10 "Albert Einstein says that spacetime is a 4-dimensional Hausdorff differential manifold on which a metric tansor is imposed that solves the Einstein field equations, and that metric tensor gives rise to geodesics and objects not experiencing any other force move along the geodesics described by that metric." IN OTHER WORDS: Einstein said that time and space are combined into one thing called spacetime. It is like a four-dimensional shape where each point has a coordinate. Just like you need a map to know where places are, spacetime has something called a metric tensor that tells you how distances are measured. Einstein also came up with equations that describe how matter and energy affect spacetime. These equations are called the Einstein field equations. When you solve these equations using the metric tensor, you can find out how spacetime is curved or bent because of matter and energy. Now, this curved spacetime creates paths known as geodesics. Think of geodesics as the paths that objects naturally follow when there are no other forces acting on them, much like how a ball rolls downhill if there are no other factors affecting it. So, objects that don't experience any other forces move along these geodesics described by the curved spacetime. In simpler terms, Einstein discovered that time and space are connected, forming a four-dimensional shape called spacetime. When matter and energy are present, they curve this spacetime, creating paths along which objects naturally move.

[@jujuria13]

Briane Greene is the counterbalance to the donald trumps of the world.

[@TruTxn82]

You do realize that is actually the republicans that would like to keep advancing this world while the democrats would love to continue to regress and create a mindless socialist country? #Trump 2016! I believe all your SJW friends are crying, you should comfort them.

[@jujuria13]

TruTxn82 asking for the genesis to be taught as "fact" is enough to discredit any republican. And how many gop senators proclaim there's no AGW? and btw, only 6% of scientists claim to be republicans.

[@Chitose2007]

+TruTxn82 Doubt it, science doesn't generally strive when a party that relies heavily on the religious community takes over the highest office in the land. #anyonebutrepublicans

[@albinosh4dow]

Arturo Cesar Not true

[@PM-vs3rh]

TruTxn82 is that why all the republican candidates deny climate change and evolution?