The Bizarre Shape Of The Universe

Thank you to David Brown for his consultation on this video.

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Creator - Jade Tan-Holmes
Script - Elizabeth Fernandez
Animations - Tom Groenestyn

Sources and References

Chapters
0:00-1:09 what is the shape of the universe?
1:09-3:16 what is topology?
3:16-3:47 topology vs geometry
3:47-5:47 the local geometry of the universe
5:47-8:46 the global geometry of the universe
8:46-10:22 topologies with flat geometry
10:22-12:34 life on a 2D torus
12:34-13:13 life in a 3D torus
13:13-13:34 life in other 3D topologies
13:34-14:58 searching for closed loops in the universe
14:58-18:39 new research by COMPACT sheds light on the shape of the universe

[barryon]

A mobius universe would be quite a twist.

[MsSlash]

As a Geometrist who’s worked on the classification of Riemannian Manifolds (basically, the 18 ones she mentioned), this video is so well done! Good job, Jade, this is one of your best works so far!

[ignorasmus]

You need to fire Tom.
Get yourself an animator who can work at least in 5 dimensions.

[larenmunday]

Me "what's the shape of the universe?"

Scientists: "We don't know, we know a girl who will make the most entertaining way to tell you that over about 20 minutes"
❤❤❤❤

[dpatts]

The biggest unanswered question in this video (that science has yet to acknowledge and is frankly concerning): how does the music at 18:25 slap so hard?

[Valdagast]

During WWII, the Soviets simplified the 'bridges in Königsberg' question by destroying some of the bridges.

[elminster]

Liked the gravitational lens image with the smiling face. :)

[HarryNicNicholas]

4:20 hate to be pedantic but your photon path is wrong, it should curve in toward the sphere, not "pushed out". see me after class.

[LiveWire]

there is a path through koningsburg that crosses all bridges only once; you just need to swim across a river once.

[ankit]

As always, lovely video, Jade! Thanks a lot for making such fun videos that are so informative! Special shout out to your animator, Tom🥰

[TheAncientAstronomer]

The entirety of the observable universe. Not the entirety of the whole universe. The flatness of the observable universe, could also be interpreted as a local flatness that doesn't necessary apply to the rest of the universe. Unfortunately we'll never know.

[freshrockpapa-e]

4:22 That representation of the path of light is a bit absurd, isn't it? Shouldn't it look like an hyperbolic trajectory? If light is going dead center towards the CoM of the planet/star it won't get curved, it will just collide with it.If light behaved in the way shown. planets would be effectively transparent/invisible.

[Richard-fbr]

Your passion is engrossing, and delivery explaining physics is first rate!
Thank you for your videos!

[nitish]

Damn, I am here after a long time and your editing has improved so much :).

[cablethelarryguy]

You're back! Can't wait to watch this as soon as I get off work.

[hoarder]

The pause for ur answer after she asks a question makes me think we're about to go into a "I'm the map, I'm the map I'm the map" song😂

[qb]

Imagine a universe where walking in one direction brings you back to where you started, but everything is mirrored left to right. To you it would look like a flipped version of your world. But you couldn’t survive because of the chirality of molecules (twist direction of molecules changes their effects). Most things you'd eat or breathe would likely kill you... You'd need to take another round-trip fast to stay alive!

[MultiSteveB]

13:21 OMG that completely explains all those Scooby Doo chase scenes! XD

[MrBrilliant-pro]

I have a question on 8:18. How did they know the actual size of these spots?

[Pingviinimursu]

18 seems like a large number of shapes I can't imagine and can't be shown to me, but which I could possibly live in 😢