24:32

Divisibility Rules

17:22

A Proof That The Square Root of Two Is Irrational

17:31

Spinning

29:42

Why 4d geometry makes me sad

2:48:11

the sham legacy of Richard Feynman

22:16

Every Strictly-Convex Deltahedron

18:38

Möbius Bagels

15:54

Lenz's Law