The questions we have about numbers are uncountable. But here are a few of them: Where does zero come from? How is there more than one kind of infinity? What is it like to do math when numbers have different colors — and personalities?

More sport science: bats and black eyes
25:25

Sport science: softballs, baseballs, and curve balls
27:12

Is there such a thing as a blue raspberry? And why are raspberries hairy?
26:32