If the molecular evidence is correct... almost five million years passed between the time our ancestors became bipedal and the time when they started making stone tools. Whatever the evolutionary force that produced a bipedal ape, it was not linked with the ability to make and use tools. However, many anthropologists believe that the advent of technology 2.5 million years ago did coincide with the beginnings of brain expansion.


The Origin of Humankind (1994)

Richard Leakey Quotes

If the molecular evidence is correct... almost five million years passed between the time our ancestors became bipedal and the time when they started ...

If the molecular evidence is correct... almost five million years passed between the time our ancestors became bipedal and the time when they started ...

If the molecular evidence is correct... almost five million years passed between the time our ancestors became bipedal and the time when they started ...

If the molecular evidence is correct... almost five million years passed between the time our ancestors became bipedal and the time when they started ...