A 2.5-million-year-old fossil of a hominin species called Australopithecus africanus had been discovered in South Africa.

"These relics are effectively fossils of the planet formation process, holding vital clues to deciphering the history of our ...

Donaldjohanson, a main belt asteroid, could be a relic of a cosmic collision that took place 150 million years ago.

Donaldjohanson formed about 150 million years ago when a much larger asteroid broke apart. Since then, its orbit and spin ...

Fossils for males and females often differ, particularly in a species like Lucy's that is sexually dimorphic: Males are much larger than their mates, and their fossils are marked by deeper muscle ...

“The Lucy fossil really transformed our understanding of human evolution, and that’s what we want to do is transform our understanding of solar system evolution by looking at all these ...

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.

Just as the Lucy fossil provided unique insights into the origin of humanity, the Lucy mission promises to revolutionize our knowledge of the origin of humanity's home world. Donaldjohanson is the ...

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 ...