Quote:
Originally Posted by Sunder the Gold
For that matter, were humans native to Earth, or did they colonize the planet along with all of the other nearby worlds?
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It's likely that similar planets would produce similar life. I think it's probably just a case of parallel evolution.
Or if you prefer, the theory of panspermia.
Of course it could be similar to the DCU or Super Robot Wars: all life originates on Earth, but that fact has long since been forgotten.