Aeons Before the Big Bang - Sir Roger Penrose Christmas Lecture

[jjclassjj]

really informative and interesting

[distractionxx]

great video thanks

[jessyjessy4]

love the video man

[smuggecko]

you have some great stuff here

[edgarmartinez08]

The sound is low (and yes, I have my volume all the way up) and not of very good quality.

[katheryncruz24]

superb!

[THEHARMONIKZ]

He's probably the sweetest genius on the planet. I love how he sat down with some coloring pens and got funky.

Fantastic talk, thanks for sharing. :)

[Typho0n86]

WTB powerpoint

[MathLessonsForFree]

Was the glass not once just sand and so on? Was the wine not once just grapes and before that something else? I don't buy the entropy argument, unless you decide that you, artificially, define a system in such a way that it fits you entropy model. At one time all was chaos, so the universe is merely returning to it's natural state.

[albedoshader]

@MathLessonsForFree: Try better examples. Plants only grow because the sun provides low-entropy energy (few high energy photons) that is transformed into higher entropy energy (a lot more low energy photons) during the energy transformation process (thus growth) in plants.

And glass can only be made by putting a lot of heat into the system, so you end with a nice glass but higher entropy in the form of heat that dissipated into the surroundings.

[greengreenbottle]

Amazing!... but it should be titled aeons befor powerpoint

[BigBillie01]

Does anybody ever read these Comments - Perhaps some but I don't think the majority of viewers bother.

OK, for my opinion there is no ultimate answers, as there no definitive questions.

The best position is to stop chasing the headless chicken of science, take a break and Listen to your own inner universe. Questions will then dissolve and answers fade from the consciousness. I trust you find yourself and the oneness of being. It's the most complex simplicity - Just Listen.

[mjusiqtube]

@BigBillie01 Take a brake yourself - and continue on a 100% basis to listen to your own inner bla-bla-bla- that will make a fortunate, blessed contributen by you NOT posting more of your utterly ignorant and harmfull comments on the real world. Your ignorance make you a very very dangerous person. Just think about it. Love & inner peace.

[nactan]

@BigBillie01 No.

[nactan]

@BigBillie01 i will NOT chase the headless chicken of my inner universe.

i will take a deep breath to dissolve trust & oneness so i can appreciate the simple complexity of scientific questions and answers. a world of infinite, ever-shifting beauty & elegance is waiting for you. just stop listening.

[vicachcoup]

So the conclusion [last 5 mins] is this - it is a theory and he doesn't have any proof right?

I'm sure there would have been a big song and dance in the media if this was proved correct

[ioeasily]

@vicachcoup

CCC-predicted low-variance circles in CMB sky and LCDM

arxiv.org 1104.5675

[chlodnia]

could someone make subtitles for this?

[Norm1011616]

@JamesonSmirnoff You obviously missed the part where RP says once the black hole reaches a certain state relative to the surrounding areas, it actually has a greater temperature than that which surrounds it which then reverses the process of entropy the blackhole is under. Essentially this makes what you just hypothosised total rubbish as once this happens the blackhole emits matter and space-time is expansive again.

[Norm1011616]

Is it just me but does hand written power point slides intrigue the mind far more than anything done on a computer?

[ritter89]

@Norm1011616 Yes, they do. I just wrote a similar post about Penrose's illustrations elsewhere. He draws very well and illustrates his own books and slides. Most of the computer generated graphics and presentations bore me to death. The font seems lifeless and the graphics are often 2-d and bland.

[kurtilein3]

@Norm1011616

not everyone has that talent for doing these diagrams and images so nicely by hand. some can do it by hand, some can do it using a computer.

but also i think you are going a bit too far, people cannot draw fractials very well, but there are some amazing pictures of 2d, (and nowadays because of more powerful computers and better tools for visualizing complex 3d-stuff ) and 3d fractials, and even movies on youtube that show how the fractal changes if you change one parameter.

[Norm1011616]

@kurtilein3 I fully take on board what you say but I feel you haven't fully understood what I meant. I used the word "intrigue", not 'enlighten' or 'educate'. My comment was pertaining more to the fact there seems to be more of a call to attention mentally once a person sees something they can identify as being a thing created by hand (at least for myself because I meant this as a subjective statement)... not that these diagrams are anymore accurate or useful than those created by computers.

[kurtilein3]

@Norm1011616

your comment is great, but i dont really have a response, i like your comment but we agree so i can just ramble on ;) . At my local bookstore there is a book focused on showing mathematical structures in 2d/3d/4d, done by a mathematics professor, and its just soooooo awesome. But quite expensive.

Doing great visualisations by hand helps in education, and Penrose is a highly visual thinker AND can draw. So thats just great, and people like him should use these skills excessively

[hat10fnatt]

oh sir roger...powerpoint...

[cyclohell]

Holy shit. The cycloid universe- big bang / big crunch diagram looks just like DNA. Maybe thats just stupid. But it seems to me that everything i look at has some sort of inherent fractal makeup. for example the tiniest particles, to the growth of crystal, to DNA and life (take that weird fractal cabbage thing, you can probably find a pic on youtube), to enormous things like the galaxy. Not like the mandelbrot or anything but it seems the whole universe fits into 1 master equation

[gkcnae]

i have to give him much credits, for breaking down the complexity of the topic to someone such as i could understand. Imagine, if he skip all the porjector presentation and simply went on his mathematical ways of explaining this. Omg, it be so boring and hard to understand.

[heelfan1234]

@gkcnae True! Why do they always have to gave a lezzbian introducing it though? Get back in the kitchen woman!!!

[19378167813728163]

really quiet!

[Zurround100]

it really irritates me when scientists cop out and say that there was no "before" the big bang, instead of admitting they dont know what happened before they just say there was no before, thats copping out.

[wowsa0]

@Zurround100 'they just say there was no before, thats copping out.'

Well what if there really WAS no before? Would it still be copping out? Scientists can't really be to blame for the way nature actually is.

[robieski]

Is there a place where we can download these slides?

[KoningStoma]

@JamesonSmirnoff

How do you think the density will increase? The density is decreasing.

[PHYSICIST12321]

Yes the CMB's temperature is 2,7 K!!!

[mrVDyne]

hold the mic closer to your face bitch.

[pepicanable]

...unless Penrose has changed his stance on the information paradox....

[sbergman27]

The nice thing about old school presenters is that they spend their time behind the podium *presenting*, and not fiddling with their laptops, trying to figure out why their presentation is not working, or is slow and jerky, or keeps popping up notices about unused icon on their desktops or how their computer may be at risk, or the resolution keeps switching to 640x480, or keeps rebooting spontaneously, etc. Exactly why are computers better than overhead projectors and transparencies, again?

[IgorMorais666]

the audio sucks!

[christinio]

This is so obvious

[mindauggas]

probably a distinguished university, having a distinguished guest, yet still not knowing how to use a microphone correctly ... i'm sorry for complaining but the sound is so low on my computer that i have to place my head near the speakers...

[dirtyandscratchd]

i can understand a big bang, i can conceptualize of a universe spreading millions of lightyears in every direction and the forces which makes it work, but...

where is the edge?

what exists after it?

what if there is no edge,is it infinate? it cant be...

before the big bang (which spewed out everything ever) where was there?

a nowhere place?

help!

[jogayot]

@dirtyandscratchd "a nowhere place? help!"

i think more useful way of looking at it is an "everything" space. "empty" space has to have the capacity to contain anything possible... "initial" state/stage is that of infinite dimensionality and potentiality. "we" are mere flat and unique one-off realizations...

[dedalus]

No doubt Penrose is a good physicist, but as a lecturer he leaves something to be desired. His books often suffer from the same problem. By no means a criticism of his scientific work, but few are fortunate to have the combination of talents to the degree of someone like Feynmann.

[leave12]

@dedalus I just got back from a lecture of his tonight, and came on here looking for this video so I could re-watch it. It's very hard to understand the point he's trying to make. But I think that's more my problem than his.

[pepicanable]

@leave12

Really? I heard that Hawking doesn't like his 'new ideas' and that he thinks that they are going maybe a bit off -track, since he(rosen) doesn't want to accept the phenomenon of superposition, i.e cat in box can be dead or alive at the same time....

[jackalsocoke]

@pepicanable How could he not except it? I mean the same math is used in quantum cryptography, not only has working models, but has been done successfully in the lab, also supports and relies on the phenomena being 'the case.' What does Penrose suggest otherwise? Yeah, Hawking's a bit attached to maintaining unitarity.

[pepicanable]

@jackalsocoke

What is odd is that Penrose who is against the time symmetry claims that the information is retrievable , whilst Hawking claims that it is lost and cannot be retrieved, yeah i had it backwards below it is Penrose who has doubts about the time assymetry, not Hawking....

[pepicanable]

@jackalsocoke

There is a website which has an article about the two physicists debating :

'The Nature of Space-time-Fortune City' is the name of the website

[pepicanable]

@jackalsocoke

Penrose has his Weyl curvature hypothesis to back up what his views on time assymetry, claiming that the early universe had a low Weyl curvature while at dying universe, the curvature is much higher, so there is a sharp divide between the time symmetry...universe was smooth before and in contrast to its end very messy.

[pepicanable]

@jackalsocoke

unitarity?

[pepicanable]

@leave12

Hawking also thinks that Rosen is taking 'time's arrow' too seriously. like you cannot reverse every event precisely to match 'exactly' what happened in the past, you can only estimate since the entropy or disorder is too scattered to be able to reverse itself backwards every inch of the way and park every atom and molecule back precisely in its previous ordered state. I think Hawking is sticking or adhering to second law of thermodynamics with no exceptions , time move one direction

[pepicanable]

@leave12

(there's more...)

....and that there shouldn't be some 'boundary' that divides past from present.

[Lurco8]

There is a mistake in this description - the CMB's temperature is 2.7 K, not 3.7 K. Never the less it is nice to have a recorded version of this brilliant lecture - thank you for this upload!

[nactan]

@Lurco8 er, didn't he say 2.7 k? that's what i heard. something like: 3 k or 2.7 k...

[Lurco8]

@nactan Yes, that's the point - in the movie description there's a line: "A good deal of this evidence comes from a detailed analysis of the cosmic microwave background (CMB), frequently referred to as the flash of the Big Bang, enormously cooled to about 3.7 degrees absolute, by the universes accelerating expansion."

However, it is a well known fact, that the CMB temprature is 2.7 K. Yeah, I know it does not make any tremendous difference...

[nactan]

@Lurco8 oh sorry, i thought you meant penrose's description rather than the video description. no, why shouldn't you point out a mistake?

[Thejadjadjad]

@Lurco8 you are all faslse god and jesus exist

[neuraxon77]

Information need not be lost. Just as the surface of a blackhole contains the information inside the blackhole, the information need not be lost in subsequent Aeons. See Tim Palmer's interpretation of conserved phase space.

Information dissipates from infinite energy of the vacuum (before the Big Bang singularity) to mass and infinite gravity (blackhole singularities), and just as the continuum hypothesis proposes, there is always a larger set containing the smaller set. Entropy increases.

[xxxrandomjamezxxx]

Hey nice video u should check my channel out :)

[AMackem]

absolutely fantastic!

[ubear2b]

Mind-blowing!

[CovStudent]

thanks Sir Roger Penrose for visiting us!