6.3—How Did the First Humans Live?

We often teach dogs a few basic tricks, such as how to sit, stay, and fetch. However, have you ever seen dogs teach one another tricks? They might mimic each other’s behavior, but that’s really not the same thing. Humans, on the other hand, can deliberately pass information to each other and teach one another new skills. This makes it much easier for each generation to pick up where the previous o