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Define "human", and we can narrow it down somewhat, but somewhere between 2 million years and 500,000 years. If you include Australopithecus hominids, that may go back 5 million years or more.
"Cro-Magnons" are us, and Neanderthals were certainly human; in fact, almost every human except those descended from purely African stock are at least a few percent Neanderthal in our ancestry. But was Homo Erectus human? And were do we draw the line between "human" and "pre-human"?
apex answer- 200,000
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoabout 1,000,000,000 yrs. (1 billion)
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