For hundreds of thousands of years, several specie... ...the same time: the Neanderthals, the Denisovans, Homo erectus, Homo floresiensis, and possibly others we don't know a... ...n humans? There is now a lot of DNA evidence that Homo sapiens interbred with Neanderthals and...
https://www.neatorama.com/2013/01/17/The-Evolutionary-Biology-of-Star-Trek/
The Evolutionary Biology of Star Trek...
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