At 3.5 million years old, this fossil of a species that would be named Australopithecus bahrelghazali was the first indication that other hominins lived around Lucy's time, Yohannes Haile-Selassie ...

Of all primates living today, only we humans walk fully upright. But Lucy and other fossil finds reveal that more than 3 million years ago, a relatively small-brained, ape-faced human ancestor ...

"It's rarely the case that fossil bones record evidence ... the contentious debate about whether or not Lucy and her Australopithecus afarensis species -- which walked upright -- lived in and ...

Remarkable new fossils from Swartkrans Cave reveal that a prehistoric relative of humans was also extremely small and ...

afarensis (e.g. Lucy). However, “[t]he contemporaneity of the two species now suggests that a more complex family tree prevailed early in the human evolutionary process,” the study authors write.

Previously, scientists thought the Homo genus didn't split off from the more primitive Australopithecus species - which the famous "Lucy" fossil belongs to - until about 2.3 million years ago.