What are numbers and where does our number sense come from? Is numeracy an innate part of our biology, or is it a cultural invention? In this classic episode of Stuff to Blow Your Mind, Robert and Joe explore the origins of numbers. (originally published 6/15/2021)

From the Vault: The Salt Vampires of Star Trek
1:05:47

Weirdhouse Cinema: Warriors of the Year 2072
1:44:28

Mercury: Inner Messenger, Part 4
59:28