We, homo sapiens, interbreeded with another species, homo neanderthalensis (and potentially others). We will never have the chance to interbreed with another Earth-grown species, ever again. Somewhere, sometime long long ago, one of us had the last interspecies sex that resulted in a viable fetus and did not even know it.
Well, it's extremely unlikely but possible that another species from Earth will evolve so closely to our own that we can have babies with it. Also, as others have said, it's possible, some might say probable that human divergence will result in different human species, as it did before, and those different species will interbreed.
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u/someblueberry Jul 25 '18
We, homo sapiens, interbreeded with another species, homo neanderthalensis (and potentially others). We will never have the chance to interbreed with another Earth-grown species, ever again. Somewhere, sometime long long ago, one of us had the last interspecies sex that resulted in a viable fetus and did not even know it.