7:36

Unexpected Shapes (Part 1) - Numberphile

5:09

Easy Origami Heart with Surprise Message / Pop-up Card - How to Fold

13:08

Paradox of the Möbius Strip and Klein Bottle - A 4D Visualization

40:29

Adam Savage Builds a Paperclip "Borromean Box" with @standupmaths

10:26

Why Möbius Strips Make Better Pianos

13:06

The Fractal Menger Sponge and Pi

18:53

Cones are MESSED UP - Numberphile

13:24

A needlessly complicated but awesome bridge.