Inflation & the Universe in a Grapefruit - Sixty Symbols

In the second "extended interview" with Professor Ed Copeland, he discusses inflation, the Big Bang and when the observable Universe fit inside a grapefruit.

This project features scientists from The University of Nottingham

Sixty Symbols videos by Brady Haran

A run-down of Brady's channels:

[XLsDiary]

I could listen for hours to the voice of Professor Ed Copeland regardless of the subject and regardless of whether I understand anything or not.

[soulcatch]

I would just like to thanks Professor Copeland and Brady for taking the time to make this video.

[scuttlefield]

Brady: I'm loving these extended interviews. I know that we have part 3 yet to come, but I'm hoping that you have more of these planned. Nice job!

[antivanti]

I love these videos.

Brady asking "is this the observable universe or the whole universe" shows that there is a big problem with the way we use the word universe. We need some sort of nomenclature that is less ambiguous than "universe" and "Universe" or the cumbersome "observable universe" and "entire universe".

[derekhudson]

Looking on YouTube, I note that almost everyone, Christian, Secular, Muslim, is an 'expert' on (a) biological evolution, (b) cosmology/the 'big bang', and (c) philosophy! Except, of course, they're not, so how interesting to learn the latest ideas from someone who actually has knowledge and understanding of the subject on which he speaks. Thanks for uploading. 

[ragnkja]

I like these long interviews. They give me insight into what cosmology really is, and how it's incredibly interesting. I've already decided that if at all possible, I want to be a physicist, and these videos didn't just help me make that decision, they are also helping me figure out what areas of physics are most interesting and suited to how I work. Thank you, Brady, and *Thank you, professor Copeland*.

[MansoorAman]

mystique must be the professor's way of saying bullshit. 

[elcapitan]

wtf am i doing here, ten minutes ago i came on youtube looking how to make icecream

[Denasdc]

turned it on to get asleep. got a hang of it and now I'm more awake than anyone ever being

[ultradevon]

there is nothing like the sweet smell of physics first thing in the morning 

[GigaBoost]

The cutaway black text is really pretty bothersome, please overlay it on the video instead.

[Terrorkekx]

So what was that sound before and after the video..that grumbling....sounded familiar...is it background radiation or something?

[leeostadi]

Im loving this date with Ed simulation!

[joetylerdale]

As I listen to Ed late in the evening, a warm, safe feeling surrounds me much like mum calming me when my imagination would run wild. So many questions about "why" interrupt my sleep occasionally, but Ed is like a hand in the deep part of a pool reassuring and giving hope and understanding to purpose and questions that elude me.

[PseudoTactics]

NEW DISCOVERY!!!! 
Evidence of inflation finally discovered! I look forward to hearing from Ed on this in the next sixtey symbols vid.

[davecrupel]

is there any reason his ears are HORRENDOUSLY red? lol

im sorry i had to point that out. I'm an amateur astronomer, and this is indeed an interesting video. all 3 of them are. And Ed is awesome :D

[DamianReloaded]

Was "time" constant through all the process of the bigbang? Is this taken into account when scientists say "I took 10^-x seconds for this to happen". What's the point of reference for that time counting?

[AirmailMRCOOL]

Brady, thank fuck you are there whenever the audience needs an analogy.

[sockmaster]

I don't understand how scientists can talk about minutes or seconds after the big bang.  Wouldn't time dilation due to the immense gravity and velocity mess with that?  Are scientists able to account for it, and therefore give accurate numbers, or is it just an analogy, like quarks having color, where it helps us understand what's going on?

[rogerdotlee]

Well done again. I'm going to have to listen to this one again as he left me lost more than once. 

That's OK, though. That's how you learn.