Homo erectus was not alone in ancient Africa. Newly discovered fossil
evidence, detailed in the latest issue of Nature, strongly suggests that
no fewer than three distinct species of early humans from the genus
Homo co-existed on the continent between 1.7 and 2 million years ago.
The findings, which run counter to the hypothesis that modern humans
evolved linearly out of Homo erectus, provide some of the most
compelling evidence to date that there were multiple, parallel lines of evolution early in our genus' history.
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