1 / 3

Human fossil

The recently discovered skeleton of an australopithecine boy sits on display at the Iziko South African Museum in Cape Town, April 24, 2010. The fossil is one of two partial skeletons unearthed in a South African cave that belong to a previously unclassified species of pre-human dating back almost 2 million years and may shed new light on human evolution, scientists said on April 8, 2010. Fossils of the bones of a young male and an adult female suggest the newly documented species, called Australopithecus sediba, walked upright and shared many physical traits with the earliest known human Homo species. REUTERS/Mike Hutchings

Human ancestor fossils hidden in plain sight

Two years ago, scientists announced they had discovered partial skeletons from a new species of human ancestor in a South African cave. Now, more remains have turned up — in a large rock about 3.3 feet (1 meter) in diameter hiding in plain sight in a laboratory at the University of Witwatersrand in South Africa. (July 12)