Details on the origins of all the…
6332201 BCE to 3346318 BCE
Anthropologists believe that East Africa's Great Rift Valley is the site of humankind's origins. (The valley traverses Ethiopia from southwest to northeast.)
In 1974 archaeologists excavating sites in the Awash River will valley discover three and a half-million-year-old fossil skeletons, which they name Australopithecus afarensis.
These earliest known hominids stand upright, live in groups, and have adapted to living in open areas rather than in forests.