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Q&A Plausible ways for the alien species to be able to impregnate every and any species?

In many movies, alien species often have the ability to impregnate "every and any" species and have their mutant offspring. I have a story setup where some, not so conscientious, scientists decide...

4 answers  ·  posted 5y ago by PiggyChu001‭  ·  last activity 5y ago by PiggyChu001‭

Question biology xenobiology