Researchers studying fossils from northern Kenya have identified a new species of human that lived two million years ago.
The discoveries suggests that at least three distinct species of humans co-existed in Africa.
The research adds to a growing body of evidence that runs counter to the popular perception that there was a linear evolution from early primates to modern humans.
Anthropologists have discovered three human fossils that are between 1.78 and 1.95 million years old. The specimens are of a face and two jawbones with teeth.