I’ve discovered a site that makes science easy. From astronomy:
to paleontology:
Animals of a given species are alike because they inherit a certain set of genes from their parents. Every so often, something goes wrong with the mechanism that transmits the genes, and an animal is born that doesn’t resemble its father and mother. You probably know of examples in your own family.
See the rest at Science Made Stupid.
Chasing the Wind 
That’s one scary duck.
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I’m trying to decide if you meant a double entendre with that.
Probably not. Of all the words to describe me, “scary duck” has never been used before. “Odd duck,” yes. “Scary duck,” no.
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