Science Remarkable skull hints at dramatically simpler view of human evolution

A 1.8-million-year-old skull suggests that several species of early humans might not be different species at all, meaning the tree of human evolution might have fewer branches than previously thought.

Courtesy of Georgia National Museum/AP

Five remarkably preserved, 1.8-million-year-old skulls are are opening a unique window on early human evolution. In the process, they hint that several early human fossils found elsewhere and identified as different species may actually all be members of this same species, according to a new study.