18:42

The impossible chessboard puzzle

9:27

Hexagons are the Bestagons

21:58

Group theory, abstraction, and the 196,883-dimensional monster

26:51

New divisibility rule! (30,000 of them)

18:39

This equation will change how you see the world (the logistic map)

17:26

Researchers thought this was a bug (Borwein integrals)

30:15

The Bingo Paradox: 3× more likely to win

21:36

Fractals are typically not self-similar