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Species with big sex differences are more likely to die out [New Scientist]

par Frédéric Magné - publié le

It was Darwin who realised that sexual selection by females can lead to the evolution of extreme traits in males– from colourful plumage to extravagant dances and displays – that reduce their overall fitness. Biologists have been arguing about how this affects the long-term survival of species ever since.

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