A Brief Introduction to General Relativity - with Anthony Zee

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Anthony Zee gives us a tour of gravity through Einstein's Theory of General Relativity.
Anthony's book "On Gravity" is available now - geni.us/xAf86t.
Starting with the discovery of gravity waves, Anthony goes on to explain how gravity can be understood in comparison to other classical field theories, presents the idea of curved spacetime and the action principle, and explores cutting-edge topics, including black holes and Hawking radiation. And what can our current knowledge tell us about what we don't yet know, from quantum gravity to mysteries of dark matter and energy.
Watch the Q&A: • Q&A: A Brief Introduct...
Anthony Zee is a physicist, writer, and currently a professor at the Kavli Institute for Theoretical Physics and the physics department of the University of California, Santa Barbara.
Professor Zee has authored or co-authored more than 200 scientific publications and several books. He has written on particle physics, condensed matter physics, anomalies in physics, random matrix theory, superconductivity, the quantum Hall effect, and other topics in theoretical physics and evolutionary biology, as well as their various interrelations.
This talk was streamed live by the Ri on 28 July 2020.
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5 окт 2024

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Комментарии : 245

@robjohnston1433 2 года назад

I had never even heard of Prof Zee. But after hearing THIS, he is my new favourite Physics teacher!

@jameslai6879 4 года назад

Prof. Zee, thank you for the talk. I enjoyed your Fearful Symmetry in college three decades ago. Now I have started reading textbooks for seeing the equations, including your Nutshell books.

@1nsurr3ction 4 года назад

Professor Zee, what an amazingly narrated lecture, your students are very lucky.. you've gained another fan 🤯🌞

@theElrin 4 года назад

I love his presentation. Another one I can listen to anytime.

@PassiveSmoking 3 года назад

When I was a kid I used to watch OU lectures on TV for fun (I tended to wake up VERY early back then and that was pretty much the only thing running on TV in the small hours). These lectures remind me a bit of that.

@toxicara 4 года назад

Professor Zee, you remind me of one of my mathematics professors. He would stop mid-sentence to drink water or cough. But it would not stop the lesson. Please keep teaching us regardless and only apologise if you get things wrong.

@alexandreramos8484 4 года назад

I was listening to the talk while going through my notes of math methods. So surprised he talked about Brazil! Greatings from a Brazilian Physics undergrad!

@User-jr7vf 4 года назад

hue hue BR

@freelooc1 Год назад

He grew up in Brazil.

@misterschifano 4 года назад

Thank you for this. I’m grateful for achievable descriptions of GR that I can use with my students, and you have a lovely patient style. If I may: it’s worth noting that Laplace describes a mechanism for inverse square “action at a distance” as the resolution of a field potential in 1799, when Faraday was still in short pants.

@McFugo 4 года назад

I love the historic interludes, especially the image of German physicists hunting an eclipse in Crimea as WW1 erupts. I'd read that book (even though it never happened)

@LowellBoggs Год назад

I enjoyed the first few chapters of Dr. Zee's book, Einstein gravity in a nutshell. He is a very good educator, but the math requirements exceeded my tolerance after the first few chapters. I wish i had the background to fully appreciate what he was teaching! Best of luck dr zee!

@smileyeagle1021 4 года назад

As an accountant, I'm not sure how comfortable I am that the embezzling analogies worked as well as they do.

@ckkwok4188 2 года назад

I really like his joke at the end of this lecture on Darwin , it make me laugh for 15 second , wonderful !

@allanp2303 4 года назад

I think Maxwell was not exactly "English". He was a famous Scottish scientist. Born and educated in Edinburgh before going to Cambridge University and then UCL in London where he made his far reaching discoveries of electromagnetic phenomena.

@gb7767 4 года назад

Cambridge, then Aberdeen and onto King's College London (KCL), not UCL

@marc-andrebrunet5386 4 года назад

🎯The idea of a little break in the middle was a very good one. 👨‍🏫✌

@ZeedijkMike 4 года назад

A little different lecture on a fascinating subject. Liked it a lot. The small anecdotes added some extra "colour".

@jasper36 3 года назад

When it comes to general relativity, an hour-long introduction is *extremely* brief.

@SernasHeptaDimesionalSpace 4 года назад

At about 2:45 you introduce a picture that shows some lines that all meet at left and right, as I can see the flow at left is from the INSIDE to the OUT SIDE, the right side flow goes from the OUT SIDE to the IN SIDE but the flow at the medle just goes in one direction which is to the right. - One thing have notice is that all systems ALL must to have a 2 way flow or UP and DOWN FLOW but as well may be seen as LEFT and RIGHT flow where the south side cant cross to the north and vice verse, the system s flow begans at the equator s system which divides north from south and counts with both charges so is the one that may give or take as needed by the system s sides, the north side flow starts at the center of the system at the equator UP and as it goes up it splits in 2 one to the left and one to the right doing a curve at both sides and this makes the flow to returne to the disk or equator but NEVER should cross to the bottom or the south side; the DOWN or south flow starts at the disk s center and as it goes down it does split in 2 one to the left and one to the right and both sides curve so returning the flow to the disk that must not for any reason cross to the north. The above description is found in the WATER MELON FRUIT if you cut it by half so you would get round slices, some are real clear some are not but if you have a good sight and imagination you will find it in all. There is a lote more in my channel just click the logo to see such flow may be seen even in DNA PICTURES. Thanx for the info Anthon, I like the way you explaine is very clear and not hard to follow.

@PhysicsMathMan 3 года назад

Excellent lecture and lecturer!!

@pyng4233 Год назад

I am a fan of your book "The Fearful Symmetry."

@CyberUK 4 года назад

Brilliant lecture Anthony. Very enjoyable.

@harpreetsinghmann 4 года назад

General relativity is geometric interpretation of gravity. Inspired by Einstein's idea, geometric interpretation for other forces like for electromagnetism were also made. Read more on: Kaluza-Klein theory, Gauge theory, and Rainich-Misner-Wheeler theory.

@giannisniper96 4 года назад

Kaluza-Klein has been refuted since a long time ago, and "gauge theory" is a generic term for a laaaarge class of theories (including the standard model)

@harpreetsinghmann 4 года назад

@@giannisniper96 I'm not much of a theorist here, i read about it somewhere thought to link it up. Electromagnetic F = kq1q2/(r^2) and Gravity F = Gm1m2/(r^2) share a similarity as in inverse square law. "So like Riemann tensor in relativity is the curvature of the Levi-Civita connection on the tangent bundle of spacetime. There is - gauge theory, and the electromagnetic field strength is the curvature of the gauge principal connection on a U(1)U(1)-principal bundle over spacetime." - stack

@ASLUHLUHC3 4 года назад

39:24 Great riddle

@Arkapravo 2 года назад

Beautiful! I am not even sure I can come up with any other adjective.

@foxamongdeli6745 4 года назад

If brief is over an hour long. What is a lengthy video like? :)

@pseudocalm 4 года назад

A brief tour is 1 hour. A full tour is 1 semester.

@jithunniks 4 года назад

Thanks for this🙏

@Greg_Chase Год назад

I have an electrical engineering and physics background. If my boss came to me with the following statement, I would have to give an answer: "Greg, we have a 100 pound box of weights that was left in space where the gravity strength is so low, the box is still where we left it in space 5 years ago. I need you to explain the difference - the exact physical nature - of how the 'conditions' of space out there allow that box to not move, while if we had left the box closer to a celestial body like Earth, the box would have experienced a gradient in its inertia and would have accelerated - without propellant - into the celestial body. Greg, just answer it - your job is on the line." If I came back and said "that's gravity" or "space is curved" he would say "that's conventional thought. I need you to explain why there is no gradient of inertia far out in space where that box is still sitting." I would say "Boss, you answered your own question. That box is still there, and did not accelerate, because there is no imbalance in inertia. Close to Earth, there is an imbalance - a gradient - of inertia and the box accelerates due to the imbalance.' .

@Autists-Guide 4 года назад

8:12 England produced Faraday. Scotland produced Maxwell.

@toxicara 4 года назад

You are technically correct. The best kind of correct.

@allehhn 4 года назад

@@toxicara "you are technically correct" - this suggests that DLJ is in some sense not correct. do you think there is a sense in which DLJ is not correct?

@acetate909 4 года назад

Maxwell was an actual physicist, Faraday was a tinkerer and philosopher.

@toxicara 4 года назад

@@allehhn that's a futurama reference. Nothing more

@michaelsommers2356 4 года назад

@@acetate909 Faraday was an actual physicist.

@PatrickPoet 4 года назад

I did not find action at a distance bizarre because of extensive and playful experience with magnets. I knew action at a distance was real in a visceral sense. I had held magnets in each hand and felt them repel and attract each other. How could I doubt action at a distance after that? I could feel the inverse square law in my hands.

@brendawilliams8062 4 года назад

I have a question. When working with 316227766 do you have any information on how 1001032155 and 1003560759 set up their system. I have no higher education. I work on my own. This would help and save me a year of work. Appreciate you. Thx.

@5Andysalive 4 года назад

Keppler was already aware (obviously) that bodies affected each other. He wrote the rules for it. He just accepted it was not for him to find the reason why. I think, he threw some vague ideas about magnetism around.

@5Andysalive 4 года назад

@Bob Trenwith Yes.... Thats literally what i said. That he was aware that they DO it. And over a large distance. Which is what the lecturer claims only for Newton. That he figured out the rules they do it by but that he didn't know why and accepted that. Newton started from Keplers how and answered mostly the why. But Kepler was already aware of the question.

@허유선-y4m 4 года назад

Thank you for your lecture.

@sam08090 3 года назад

Amazing lecture ❤️

@GuerrasLaws 4 года назад

The energy, which is being applied from within the planet's core, is what creates gravity and not because of the size of the planet, its mass, or by space-time curvature. Gravity cannot exist without applied energy. ~Guadalupe Guerra

@urinater 4 года назад

An A to Zee lecture on gravity.

@KipIngram 2 года назад

2:02 - No, I didn't find it bizarre. I was very young and my thought processes were not sophisticated enough to question expert opinion. I took it for granted that the explanation was valid. I've come quite a ways since then, and there *are* some things I find questionable. But I just wasn't ready for such an action at that time.

@Okla_Soft 4 года назад

Informative and entertaining, 2020 has been full of great physics content.

@mrkhunchang 4 года назад

The story of Hawking radiation wasn’t finished. So the particle-antiparticle pair was split up by the black hole .... violating the HUP? Energy was created from the vacuum but never paid back. How to explain that?

@thomasolson7447 Год назад

Do they backfill the shafts when they do the gravity wave tests? Cause that kind of seems important.

@tastedalmond85 4 года назад

Thank You!

@qualquan Год назад

A perfectly rigid rod would be a SINGLE structure. Pushing one end moves the other end instantaneously and does NOT violate relativity because info cannot travel faster than C BETWEEN particles or structures. It says nothing about WITHIN a single structure. A perfectly rigid structure is a single structure with no speed limits WITHIN it. Interesting he quotes Eddington asking "how many pounds of light does a pound buy you?" As if we can weigh light. How true!

@mccarronjd 4 года назад

How does curvature explain gravity? In my view, you need to consider a repulsive force in the context of a differentially expanding universe, as well as spacetime curvature.

@mooncheese2495 3 года назад

not exactly

@abcde_fz 2 года назад

~55:30 THANK YOU FOR MENTIONING that both particles AND anti-particles can appear to radiate from a black hole. NOW IF WE COULD JUST GET someone to tell us what would happen if a black hole **just happened to have ONLY anti-particles escape the horizon**. Would the black hole still evaporate??? 🤔🤔🤔

@johnnywilliams2641 3 года назад

If light is a massless particle then why does gravity effect it.?

@craigmckay3514 2 года назад

In the context of your question gravity affects/curves the spacetime through which the photon propagates. It doesn't affect the photon ditectly. From the photon's point of view it propagates in a straight line but through curved spacetime such that an observer sees it's path as curved. Even that explanation is somewhat clumsy.

@DaKoopaKing 4 года назад

The Q&A link is wrong

@brendawilliams8062 4 года назад

To know the gauge of the 13 steps of 1003560759 with 1001032155 would help me save a year of work.

@Videot99 3 года назад

One thing I've always wondered: If gravity is not a force but rather is the curving of spacetime, why does a rock fall when you let go of it? Seems like momentum should cause it to just sit there floating in the air.

@wan3839 3 года назад

About 58:00, Einstein's quote. Curvature causes you to have a preferred path through spacetime. Without curvature then everywhere would be the same, and you would be floating in mid air.

@phenixorbitall3917 Год назад

The last joke was pretty good actually

@michaelelbert5798 2 года назад

While I often ponder on writing a book, but I realize that by the time I have it published it would be out of date to me at least.. I know . That's not a very good excuse.

@pcuimac 4 года назад

I have built this chinese machine once from LEGO Technic. It's just an alternate configuration or application of the differential mechanism used in cars.

@En_theo 4 года назад

@11:00 why can't we consider that electromagnetic waves are just tiny gravitational waves, generated by micro-black holes ? It would actually solve many paradoxes.

@wolfRAMM 4 года назад

40:00 it is also true for all the points 1.16 miles away from the south pole.

@Achrononmaster 3 года назад

@2:36 Not quite. In school (c.1980's) we were taught here in New Zealand that Newton's law for gravity was just like a engineering tool, a mere formula, not a description of gravity. By my school age folks/teachers had absorbed Einstein's theory as part of collective culture, if not quite understanding how to use it practically.

@Achrononmaster 3 года назад

@48:00 the embezzling scheme is not always practical. To skim off a penny usually costs more than a penny of effort! Same in QM, there is no way to profit from Heisenberg uncertainty, no free lunches. The key to QM forces is that the ability to embezzle energy is what allows energy to be exchanged - so still no free lunch, but we do get a break-even pay-off - free existence of physical forces.

@martinsoos 4 года назад

The movie "House of Sand" It's main parallel compares someone's life to going to the moon and finding nothing but sand, It was a depressing movie, great videography though.

@davidf2281 4 года назад

This man is living proof that exceptional intelligence does not guarantee even basic awareness of the principles of typography.

@arnesaknussemm2427 4 года назад

William White the floor is yours...

@Howtard 4 года назад

It's hilarious that this is true even though I haven't started the video yet; the first frame proves your point!

@davidf2281 4 года назад

11:23 Better out than in.

@richardlinsley-hood7149 3 года назад

So tell me the difference between 2 identical objects moving in the same directions in a rest frame and the same 2 objects moving in opposite directions in the rest frame. Other than the direction that is. One has no relative motion (v) between the objects. The other has (2v).

@notloudfern 6 месяцев назад

Can anyone give any insight into how isaac newton bends time? Please and thank you!

@seanwhitehall4652 10 месяцев назад

37:00 that is a very intense horizontal scale

@amedeofilippi6336 3 года назад

If spacetime is curved and objects have to move according to its curvature I simply can’t understand why there is any need to look for particles called gravitons.

@Bill..N 4 года назад

I enjoyed the show ! Could it be possible that an infinitly rigid rod could exist in principle, but would NOT transmit any information no matter how hard it was struck?

@agffga8757 4 года назад

@Boodysaspie If it's infinitely rigid it cannot absorb energy. This means that if such a rock exists energy conservation is violated. Or better, such rock cannot exist cause of energy conservation

@Ticklersoft 4 года назад

How about when you move the rod? Does the other end move immediately or it takes a while to propagate?

@Bill..N 4 года назад

@@Ticklersoft (Edited for clarity) Good query friend..it would HAVE to move the other end instantly, but this doesn't HAVE to mean information moves THROUGH the rod as a result of physically moving one end...Since an infinitely rigid rod would be unable to vibrate, its structure would have to be made of something like the super compressed neutrons in a neutron star. information would not be transferred then right ?? Wrong?

@Bill..N 4 года назад

@William White If its INFINITELY rigid it seems that there could be no bending or vibrating of any kind... it should be infinitely resistant to ANY such motions..

@Bill..N 4 года назад

@William White if the atomic bonds could give way, then it's not infinitely rigid..

@gorgig9136 Год назад

Coulomb law work on distance, has the same formula...why is no bizarre ?

@ASLUHLUHC3 4 года назад

"You're lacking in philosophical faculty", that is a good one.

@calholli 4 года назад

That's what she said.

@2009Artteacher 2 года назад

thanks i enjoy it and learned something , Though everything fell apart when you correctly used a thought from Aristotle in your closing remarks . Though you gave the science boys to have front seats while while closing the door on Aristotle face . its obviously you do not understand metaphysics ,the very thing that en abled science to be . Very strange that a a person teaching quantum physics does not understand metaphysics proper .

@NoNameAtAll2 4 года назад

this talk has too many letters on each slide a lot of them can be improved by separating paragraphs into separate slides or by them appearing 1 paragraph at a time

@User-jr7vf 4 года назад

Idk about you, but I, as an undergrad physics student who happens to be studying Relativity seriously for over a year, came to watch the video already knowing that I wasn't going to see a textbook presentation of the theory, but rather a kind of informal talk with many analogies present. This is what you should expect from a channel like this. And it's not that the channel lacks quality, it has to do with the audience... which would not get a thing otherwise.

@BlackHoleForge 4 года назад

On Gravity from A to Zee

@brendawilliams8062 4 года назад

Given the Planck 6666 would in relationship to 3.14572999 would have to lay at some 3.14 the relationship is important to me. Thx.

@AtulKumar-cg3rl 4 года назад

Why so many dislikes?

@alwaysdisputin9930 3 года назад

Why does mass/energy warp/shrink spacetime? That it can do so using jedi powers at a distance without connecting ropes seems so great an absurdity that no one who has any comptetent facultly of thinking can ever fall into it.

@tokajileo5928 4 года назад

Riemann's name was Bernhard not Bernard

@brendawilliams8062 4 года назад

I understand the well let’s say spin. It’s the problem of what is between the up and down.

@SernasHeptaDimesionalSpace 4 года назад

In between the up and down flow is the neutral that divides both charges.

@curiouscat8396 2 года назад

What did he mean by NEWTON CURVED TIME? He didn't even know about gravitational time dilation! Obviously he must be talking about/in spacetime.

@AFRoSHEENT3ARCMICHAEL69 2 года назад

Well the funny thing about black holes is your eyes. What happens at the event horizon? The realization of every fear.

@guitarboogieboogie 3 года назад

'Particles annihilate each other and ...Disappear into thin air'. ? In a vacuum.

@Achrononmaster 3 года назад

Nice book, up until the end. The modern view is more nuanced. Weinberg: QFT is probably only an effective theory, reality is likely deeper than QFT. String theory is the only consistent theory of gravity and particle physics, yet string theory particle content is not the real world, but at least shows gravitons as string modes are gravity consistent with QM. Gauge/gravity duality is showing gravity is perhaps already quantized, so you do not need to quantize gravity, it is a theory of a bulk spacetime with QFT being a boundary holographic dual. Gravitons are just a holographic dual of bulk gravity, but which theory you consider more fundamental is arbitrary, you can have bulk gravity giving rise to effective gravitons asymptotically near the boundary, or a holographic dual theory mimicking a spacetime. Einstein was right AND quantum field theorists were right. It's the old blind men exploring an elephant story.

@Achrononmaster 3 года назад

I do realize physics nerds will object saying that bulk gravity is string theory with gravitons. But that is just one model. We do not know a holographic CFT dual for a de Sitter spacetime. If we did, it is conceivable it could be Einstein gravity with non-trivial topology rather than strings. This is hard territory to research, but my conjecture would be that what we observe to be QFT is not a holographic dual of string theory in the bulk, but a dual to topologically non-trivial bulk gravity. How do we get extra dimensions in the bulk then? I hypothesise the answer is that a trivial topology with extra 4+N dimensions is only an approximation to 4D gravity with non-trivial topology. If you begin with exotic topology in 4D spacetime gravity, but then ask how to model this with just curved Minkowski spacetime, then I think you will find you need to add extra fictional dimensions to get the necessary degrees of freedom that your model trivializing the topology ignored. Witten should really be working on this, not on superstrings.

@Greg_Chase Год назад

My boss says "Greg, when an electron and positron annihilate in a lab experiment, gamma rays are produced. Why can't we detect a gamma ray background, since quantum fluctuations are thought to be pervasive throughout the Vacuum?" He's my boss, I have to reply. "Boss, either the quantum fluctuations are purely mathematical ideas only and never attain physical existence, or there actually are no quantum fluctuations, OR there really are particle-antiparticle pairs throughout the Vacuum but they do not annihilate - they are persistent." He retorts "So you don't believe the claim 'electromagnetic waves do not need a medium to propagate?" .

@fanzhang3291 3 года назад

Excellent talk, really enjoyed it!

@gpcrawford8353 4 года назад

Just a layman but I read that the warping of time is the main component of general relativity space warping contributes little effect. BTW Einstein had to learn the maths and his one time classmate and now professor of descriptive geometry Marcel Grossman taught him. At this time Einstein was professor of theoretical physics at his old university ETH still puzzling over gravity he couldn’t find a mathematics that treated all object equally ,a la Galileo. To his amazement Grossman said there was but it was arcane being differential geometry and tensor calculus ,Einstein beg him to teach him which he did and between them published a draft theory in early 1914 ,which as professor Zee points out, was wrong. It was an American and a German who traveled to the Crimea the American got sent home as America was not in 1st war but German got thrown in jail.

@harpreetsinghmann 4 года назад

How does matter interact with "empty space"?

@harpreetsinghmann 4 года назад

@Ozymandias Heliogabal Nullifidian That i know off, I'm wondering how? How does it interact with the soup of virtual particles?

@alkaajani1083 4 года назад

Space + time is cosmic cycle of day and night,,if E= seconds,m= hours ,c= minutes..then it works

@User-jr7vf 4 года назад

@@harpreetsinghmann there's no soup of virtual particles in Eistein's relativity.

@harpreetsinghmann 4 года назад

@@User-jr7vf Then what is: ■E■T = h/2

@User-jr7vf 4 года назад

@@harpreetsinghmann Idk, you tell me what your expression stands for. But again, there's no concept of virtual particles in classical theories.

@logic_talk 3 года назад

I like ur name professor AZ

@Hope4Today9 4 года назад

Mothers Milk .... that's funny ... now that's all I can see Thanks a lot Albert!

@brendawilliams8062 4 года назад

My work indicates that this transformation occurs at 3.14572988

@daveisbrill 2 года назад

Magnetism. Is that action at a distance? I thought it was.

@schmetterling4477 2 года назад

No, magnetism is a perfectly local effect predicted by special relativity.

@anfigo18 3 года назад

Wait, is the universe about to become a black hole???

@mrnarason 4 года назад

his books are kind of hard

@westinthewest 4 года назад

They're also available in paperback.

@NHGMitchell 4 года назад

Prof. Zee: here's the headline from the London Times of November 7, 1919: REVOLUTION IN SCIENCE. NEW THEORY OF THE UNIVERSE. NEWTONIAN IDEAS OVERTHROWN. I can send you the entire article if you like

@agffga8757 4 года назад

Please link it

@Borep_Yano 4 года назад

what colour is the bear? dead, the bear is dead. There are no bears at the north pole

@abcde_fz 2 года назад

If gravity IS the curvature of spacetime, WHY do you NEED gravitons??? You don't. I predict they'll never be observed experimentally. You're trying to fit gravity into the standard model when you posit a boson to explain it.

@sivansharma5027 3 года назад

This is a pretty bad lecture... Who puts blocks and blocks of text on a slide? All the side stories and tangents don't link back up either... Could easily have been half as long and still conveyed more information

@simplecope4768 4 года назад

Me: RU-vid Recommendation: Care to learn general relativity? Me: :)

@phillipholmes5206 4 года назад

Time is a concept and space is a vacuum so how can you multiply space by time and get space time? the first thing you are taught in maths is that you cannot multiply apples x oranges, yet this is what Einstein did. he states that space is being warped, by what though, by the force of gravity. Gravity only works on objects with mass, so it cannot affect space as space is a vacuun and has no mass. All of the apparent affects of spacetime being warped can be explained by the properties of light, which can be affected by gravity, as light is a particle, which has mass, and so the path of light can be bent by gravity. Time is imutable, and the same everywhere, it is only the time it takes light to ravel between two points that makes time appear different, or to move at different rates.

@Michael19841 3 года назад

Maxwell was not English he was Scottish.

@brendawilliams8062 4 года назад

And that 10030613 would have to incorporate the 13 steps.

@SernasHeptaDimesionalSpace 4 года назад

13 steps ? what steps?

@borisvladimir7151 4 года назад

The most interesting part is at 11:23

@orsoncart802 3 года назад

Haha! Well spotted! 👍

@andylaweda 4 года назад

"England" - Maxwell was Scottish.

@westinthewest 4 года назад

Technically Scotland is part of England ;-)

@nafnist 4 года назад

@@westinthewest no, it is not lol

@AcornElectron 4 года назад

Sounds very theoretical........

@tuele4302 4 года назад

Except it has been verified time and again by experiments and observations.

@renaudpoupart7775 4 года назад

you got to invite Nassim Haramein

@arnesaknussemm2427 4 года назад

Good to see even Einstein had some doh! moments lol.

@HomeEnvy23 4 года назад

I heard once that Einstein would say that he is no Einstein.

@arnesaknussemm2427 4 года назад

Flavio Das Chagas Dias in 1949 Einstein said that in 60 years time most quotes attributed to him on the internet would be false.

@alwaysdisputin9930 3 года назад

@@arnesaknussemm2427 lol

@johnkelly3886 4 года назад

Maxwell was not English.

@nafnist 4 года назад

So Maxwell is English ... ORLY!

@orsoncart802 3 года назад

Dear Professor Zee, 39:27: Choose any point from the infinity of points a distance of 1+1/2π miles (plus* a thousandth of an inch or so) north of the South Pole. Of course any bears down there would probably have been imported so one might need a few spray cans to ensure their whiteness! 😁 * The flat-earth brigade notwithstanding! 😁