A 4.4-million-year-old Ardipithecus fossil named "Ardi" shows early humans walked upright, keeping ape-like climbing ...
A ghoulish past clings like mist to the Scottish capital — if its walls could speak, they’d be screaming . . .
High in the remote folds of the Andes, at more than 3,000 meters above sea level, Argentine researchers have unearthed ...