El problema con facebook

Suppose you have a ball covered entirely with hair and you're trying to comb the hair so that it lies flat everywhere along the surface. If the ball were a donut, or it existed in two...
JAMES GRIME: Today, we're going to talk about one of the questions that we get sent in a lot at Numberphile, and the question is-- well, Brady, what's the question? BRADY HARAN: The...
MATT PARKER: 0 is a perfectly good number. And you ignore it at your peril. The problem is it's a dangerous number. And a lot of things can go horribly wrong with 0. And because it is a slightly more...