Caves are the best-known of a dozen sites in the area where a wealth of important fossils ... South Africa.

A group of tourists are guided through the Sterkfontein Caves in South Africa, Sunday, Jan. 25, 2009. The caves are the best-known of a dozen sites in the area where a wealth of important fossils and stone tools have been found

Tourists enter the Sterkfontein Caves in South Africa, Sunday, Jan. 25, 2009. The caves are the best-known of a dozen sites in the area where a wealth of important fossils and stone tools have been found

Visitors to the Origins Centre on the campus of the University of the Witwatersrand in Johannesburg, Tuesday, Jan. 20, 2009 look at a display of replica rock paintings. The center uses science and art to trace man's development. Visitors can get details of their own genetic makeup to underline one of the center's themes: that all of us are connected through a common, African ancestor.

Visitors to the Origins Centre on the campus of the University of the Witwatersrand in Johannesburg, South Africa on Tuesday, Jan. 20, 2009 look at a display of replica rock etchings. The center uses science and art to trace man's development. Visitors can get details of their own genetic makeup to underline one of the center's themes: that all of us are connected through a common, African ancestor

Visitors to the Origins Centre on the campus of the University of the Witwatersrand in Johannesburg, Tuesday, Jan. 20, 2009 look at a display of an eland after being hunted by bushmen. The center uses science and art to trace man's development. Visitors can get details of their own genetic makeup to underline one of the center's themes: that all of us are connected through a common, African ancestor

A replica of a pre-historic man is shown at the Maropeng Visitors Center on Sunday, Jan. 25, 2009. The center forms a focal point in the Cradle of Humankind in an area, north-east of Johannesburg, where fossils were found in a region declared a World Heritage Site in 1999.

A visitor passes an exhibition of mankind's transformation from prehistoric to modern man at the Maropeng Visitors Center Sunday, Jan. 25, 2009. The center forms a focal point in the Cradle of Humankind in an area, north-east of Johannesburg, where fossils were found in a region declared a World Heritage Site in 1999

A child watches a suspended mobile exhibition of replica fossils in an exhibition of mankind's transformation from prehistoric to modern man at the Maropeng Visitors Center Sunday, Jan. 25, 2009. The center forms a focal point in the Cradle of Humankind in an area, north-east of Johannesburg, where fossils were found in a region declared a World Heritage Site in 1999.