A femur discovered in Zambia could well rewrite part of dinosaur history. This fossil, 225 million years old, belongs to a silesaur, a reptile closely related to dinosaurs. Silesaurs, long considered ...

Add Yahoo as a preferred source to see more of our stories on Google. Aside from our big brains, the trait that most distinguishes humans from other animals is our ability to walk fully upright on two ...

A seven-million-year-old skull found in Chad sits at the center of a long argument about human origins. The species, Sahelanthropus tchadensis, was announced in the early 2000s as a possible early ...

More than two decades ago, scientists digging in Central Africa unearthed the 7-million-year-old remains of what may be one of the earliest known human ancestors. Only a few fossils were recovered ...

Crania, ulnae, and femora of (left to right): a chimpanzee, Sahelanthropus, and Australopithecus. (Courtesy of Scott Williams/NYU and Jason Heaton/University of Alabama Birmingham.) (CN) — The ability ...