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3 votes

Can two species from the same genus but with a different sex determination system interbreed and have fertile (or at least sub-fertile) offspring?

Not only realistic, but totally real!
mammifereviolet4694's user avatar
0 votes

Question about speculative human biology

Low gravity speciation will never occur, leaving these humans effectively the same as modern humans, but there may still be some change in variance of genes that will can lead to their looking like a ...
dsollen's user avatar
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0 votes

Would intelligent life evolve any other body plan than humanoid?

My ideas that make these aliens most unlike humans based on them needing to space travel. This requires at least propulsion and rocketry tech (if we assume they can do calculations in their head like ...
max's user avatar
  • 95

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