In this 4.4-million-year-old skeleton, scientists may have found the missing step between climbing and walking.

A 4.4-million-year-old Ardipithecus fossil named "Ardi" shows early humans walked upright, keeping ape-like climbing ...

Analysis of a 4.4-million-year-old ankle bone supports the hypothesis that the earliest humans evolved from an ape-like ...

For more than a century, scientists have been piecing together the puzzle of human evolution, examining fossil evidence to ...

The findings of this study suggest that the first humans may have originated from apes that were accustomed to living in two ...

NEW YORK -- Last fall, a fossil skeleton named "Ardi" shook up the field of human evolution. Now, some scientists are raising doubts about what exactly the creature from Ethiopia was and what kind of ...