In the wild, songs probably had to be rigid in order for mates to find each other. Birds born with a genetic predilection for musical innovation most likely would have had trouble mating. Once finches [in captivity] experienced the luxury of assured mating (provided they were visually attractive), their song variety exploded.Jaron Lanier, You are not a Gadget: A Manifesto
January 15, 2011
Assured sex and an explosion of creativity
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