A 1.5-million-year-old skull suggests Homo erectus evolved through a messy transition, with multiple human forms coexisting.
What did researchers find? A 1.6-to-1.5-million-year-old skull from Ethiopia combines features from two different stages of ...
Compared with modern humans (Homo sapiens), who have been around for the past 300,000 years, Homo erectus, or "upright human," had a long reign. The ancient human species lived from 2 million years ...