In the Red Rift Valley of Africa, anthropologist first found clues to prehistoric life. Give two examples of these clues to prehistoric life, and describe their importance to to scientific research about first humans.

The prehistoric sites have been unearthed at Kariandusi, Olduvai George and at fayum valley in Ethiopia. In all the archaeological sites, remains of early humans have been discovered ranging from Australopithecus, homo Habillis, Kenyapithecus, and stone tools. the discovery falsify the evolution theory.