What was the crucial change that set us on the path to becoming human? Our big brains, with their capacity for language and making complex tools, set us apart from other animals. Our ability to ...

It was already pretty hot by the time Donald Johanson and his graduate student, Tom Gray, arrived at the site at Hadar, ...

They consist of fossilized dental remains, skull fragments, parts of the pelvis and femur that make up the world's most famous Australopithecus afarensis, Lucy. The hominid was discovered on ...

The only known hominid fossils of that age in that location are those of Lucy and her kind, the small-brained but upright-walking hominids classified as Australopithecus afarensis. Some analysts ...