Why did we forget this simple visual solution? (Lill's method)
32:32
Why don't they teach simple visual logarithms (and hyperbolic trig)?
38:33
Pythagoras twisted squares: Why did they not teach you any of this in school?
1:13:50
The Continuity of Splines
27:26
This open problem taught me what topology is
5:27
A Sad Moment in American History
40:24
Irrésolus pendant 2000 ans : pourquoi doublement du cube et quadrature du cercle sont impossibles
33:59
Why was this visual proof missed for 400 years? (Fermat's two square theorem)
28:23