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?

(All these questions) + (a few more) = (this episode!)

Hungry for more?
• Click here for more on synesthesia
• click here for more on infinity

Music in this episode by Bopping, Advent Chamber Orchestra and Marc Sanchez.