The serendipitous discoveries of the Taung Child’s cranium in 1924, the first evidence of the species Homo habilis at Olduvai ...

This species includes "Lucy," the 3.2 million year old fossil ... boisei walked upright. Homo habilis, which actually means "handy man," is apparently the first species to make and use primitive ...

The discovery joins other finds — such as a 1.4-million-year-old bone axe from Ethiopia — that suggest the human ancestor Homo erectus often ... the famed fossil Lucy — were making stone ...