[mkeener]

Yes, Exactly! Another similar example would be the process that produced the heikegani crab.

TL;DR - Over years fishermen threw crabs with face-like patterns on their carapaces back into the ocean. Over time this produced crabs with extremely detailed faces, increasing the chances they wouldn't be eaten and could reproduce.

http://en.wikipedia.org/wiki/Heikegani

[btilly]

If you read your link, you'd find that Carl Sagan's theory is doubtful.