Are there 10^272,000 Universes? - Numberphile

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Order Tony's book Fantastic Numbers and Where to Find Them: A Cosmic Quest from Zero to Infinity

NUMBERPHILE

Videos by Brady Haran
Animations and art in this video by Pete McPartlan

[numberphile]

Details for Tony's book...
Fantastic Numbers and Where to Find Them: A Cosmic Quest from Zero to Infinity

[rashaseden]

I enjoy Brady's "man on the street" approach, asking questions we would ask, while giving a platform (and brown paper with a Sharpie) for the experts to explain their topic. Well done series, and appreciated.

[Bradley_UA]

I love how Brady doesn't pretend to understand it, but manages to ask really good questions on the spot.

[youtubersingingmoments]

They used a giant sheet of the ritualistic brown paper just to write down one number that was already in the title. I love it.

[AGENTX]

For anyone looking for some intuition about how you could 'hide' extra dimensions, imagine a flat 2D universe where you can move up/down and left/right. We could fold this plane into a vertical cylinder by connecting the left and right 'edges' together. Moving up/down would still move you as if you were in a flat 2D universe as normal, but moving left/right around the cylinder would quickly put you back where you started. If the radius of this cylinder was made arbitrarily small then moving left or right would effectively not change your position at all. Congrats, you've essentially turned a 2D universe into a 1D universe by hiding a dimension.

[morkmon]

Man questions like 3:00 is why brady is one of the best in the biz, it was what I was wondering too. Thanks for all the effort you all put into these videos, they are fantastic.

[DakotaFiles]

I think this has been one of my favourite "impossible to understand 10 dimensional multiverse"-type video. Very approachable conversation despite the complexity behind what is being discussed!

[stevealikonis]

I'm far from a math dude (I did take Math up until I was a sophomore in college but stopped) but videos like this is why this is one of my favorite channels. They really distill complex problems enough that I can mostly understand yet fully appreciate.

[arnabsngpt]

thanks a googol!
great insights as ever.

[fritz]

String theory is the most complex way to say "We don't know."

[kdSU]

Brody always asks very pointed questions! Amazing!

[LemonArsonist]

Saying String Theory is our best candidate for quantum gravity is such a contentious thing to say.
A LOT of physicist would say string theory is highly unlikely to be true at this point.

[ninjamincho]

There's something provocative, perhaps profound, about the large Numberphile paper with nothing on it besides "10^272, 000".

[adarshmohapatra]

7:00 "computational power of an 'ultimate laptop' with a mass of one kilogram confined to a volume of one liter." The most computational physic-y thing I've heard

[Rubbergnome]

If I may make a comment, Calabi-Yau compactifications of 10d strings are not the only way to go. String theory can in principle work in other dimensions and/or other backgrounds, and braneworld models offer alternatives to compactification. It's a wild landscape out there... beware of the swampland ;) cheers!

[prikarsartam]

properly getting to those key questions, really shows how intuitively strong Brady Haran is, also that says why he's such a great scientific documentarian.

[shufflecat]

Two people were walking through the park when they came upon a chess board laid out all by itself on a table.

"It looks like someone was in the middle of a game"

"Yeah... Huh, it's funny, out of all of the possible configurations the board could have been in when we found it, that it should be THIS one that we find"

"Do you think there's other chess boards in this park?"

"It's not impossible"

"Do you think every possible combination of chess board is here?"

"Hah! No, the shear number of-"

"Do you think there's a chess board where Hitler is a penguin???"

"Excuse me?"

This is basically what the multiverse conversation sounds like.

[BLClark-wfyk]

I love this show so damn much. Please don’t ever stop making content

[KatzRool]

Sometimes you've got to wonder who the audience of the string theory videos is. It's at an odd balance between almost too complicated to explain to normal people and almost too simple a video to mean anything to those who know something. Difficult stuff.

[maxtonuponry]

It really felt like the universe nodded at him by moving the paper after he said it had positive vacuum energy at 4:19