Everyone's a comedian!

[pyesetz]

"Some things have evolved many times on Earth such as hearts, eyes and jointed limbs, and the four 'F's - flight, fur, photosynthesis and sex," says Jack Cohen, a reproductive biologist who has helped science fiction authors design plausible aliens for their books.
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Comments

[dakhun]

And if someone goes to a "reproductive biologist" to design plausible aliens, then you know they must have had something in particular on their mind.