They're mutations caused by radiation. No, wait; the government...
Valentine McKee: They're mutations caused by radiation. No, wait; the government made 'em. Big surprise for the Russians.
Rhonda LeBeck: Well, there's nothing like them in the fossil record... Okay, so they predate the fossil record. [pauses] That'd make them a couple of billion years old... and we've just never seen one until now. Right.
Earl Bassett: I vote for outer space. No way these are local boys.