Minute Physics shows us what happens if mathematicians have too much time on their hands. They’ve demonstrated that you cannot comb a ball of hair. Never, ever. It will always have a place where a hair sticks out. That is why I cannot get my hair to sit the way I want 😀 The Hairy Ball Theorem explains why somewhere on Earth, at any time, there is a place where the wind doesn’t blow. Interesting, huh?