but this gorge holds a treasure chest of fossils spanning over 5 million years. Major fossil findings include Austrolopithecus Zinjanthropus (Boisei) , Austrolopithecus Afarensis (like Lucy ), and Homo Habilis (tool guy/handyman). The "Laetoli footprints" were perfectly preserved in a rock bed 30 miles from Oldupai. They distinctly show two upright