These ancient human relatives include the first species with evidence of upright walking and running like humans. They represent more than a third of our evolutionary history.
The provocative idea that our genus arose with a deactivated muscle gene turned out to be wrong.
Australopithecus afarensis was an early member of the hominin lineage, but it was not intermediate between humans and living great apes in all ways.
New trails expand our knowledge of body size and behavior of some of the earliest known bipedal hominins.
On a visit to Charles Darwin's home, I share some perspectives on how paleoanthropologists think about species.