Public Library of Science

Wild chimpanzees exchange meat for sex

Wild female chimpanzees copulate more frequently with males who share meat with them over long periods of time, according to a study led by researchers from the Max Planck Institute for Evolutionary Anthropology in Germany, ...

dateApr 08, 2009 in Plants & Animals
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Crows show advanced learning abilities

New Caledonian crows have, in the past, distinguished themselves with their advanced tool using abilities. A team of researchers from the University of Auckland and the University of Cambridge have now shown these crows can ...

dateDec 14, 2011 in Plants & Animals
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Cheating favors extinction

Cooperative behaviour is widely observed in nature, but there remains the possibility that so-called 'cheaters' can exploit the system, taking without giving, with uncertain consequences for the social unit as a whole. A ...

dateApr 30, 2013 in Evolution
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