Zero Factorial - Numberphile
11:10
One minus one plus one minus one - Numberphile
13:00
Problems with Zero - Numberphile
12:46
What is the factorial of -½?
9:48
Fibonacci Mystery - Numberphile
17:22
A Proof That The Square Root of Two Is Irrational
12:58
zero factorial, why 0! should be 1, 4 reasons
20:25
A 1.58-Dimensional Object - Numberphile
7:34