'New species' of ancient human unearthed in Ethiopia
28 May 2015 Last updated at 17:55 BST
A new species of ancient human has been unearthed in the Afar region of Ethiopia, scientists report.
Researchers discovered jaw bones and teeth, which date to between 3.3m and 3.5m years old.
The new species has been called Australopithecus deyiremeda, which means "close relative" in the language spoken by the Afar people.
Science correspondent Rebecca Morelle reports.