In this episode, we conclude our journey along the human timeline with a look at the genus Homo, of which we are all card-carrying members. Amber also contributes a brief study of human butts-- what's up with them?

To learn more about our closest relatives, and ourselves:

Human Evolution Timeline Interactive (Smithsonian Institution)

Human Fossils (Smithsonian Institution)

Exploring the fossil record: Homo habilis (Bradshaw Foundation)

Homo erectus (Smithsonian Institution)

Homo erectus (Bradshaw Foundation)

Homo neanderthalensis (Smithsonian Institution)

Why do we have butts? (Gizmodo)

Ask evolution: Why do we have butt cheeks? (SBS)