group selection: Quick Facts

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Photos

Belding's ground squirrel; Spermophilus beldingi

A group of lions in tall dry grass, with one lioness chasing a running warthog in the foreground.

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Topics

natural selection survival of the fittest sexual selection adaptation Deviously Darwinian: 6 Strange Evolutionary Phenomena Today in History—September 15: Charles Darwin Visits the Galapagos Islands Why do giraffes have long necks?