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A comment on Spider That Builds Its Own Spider Decoys Discovered. Parent comment

Re:Spider That Builds Its Own Spider Decoys Discovered by mkeener on Wednesday December 19, 2012 @02:45PM (#4944373)
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

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Re:Spider That Builds Its Own Spider Decoys Discovered by btilly on Wednesday December 19, 2012 @04:39PM (#4945000)
If you read your link, you'd find that Carl Sagan's theory is doubtful.
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