Darwinian puzzle
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Cydebot
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Robot - Moving category Animal behaviour to Ethology per [[WP:CFD|CFD]] at [[Wikipedia:Categories for deletion/Log/2006 July 1]].
A '''Darwinian puzzle''' is a [[Trait (biological)|trait]] that appears to reduce the [[fitness (biology)|fitness]] of individuals that possess it. Such traits attract the attention of [[evolutionary biology|evolutionary biologists]]. The phrase "Darwinian puzzle" itself is rare and of unclear origin; it appears most often, but not always, in the context of [[animal behavior]].
==Examples==
The following phenomena are sometimes called Darwinian puzzles:
*[[Altruism in animals]]
*[[Homosexuality in animals]]
*[[Senescence|Cellular senescence]]
{{evolution-stub}}
[[Category:Ethology]]
[[Category:Evolutionary biology]]