The Journal of Human Evolution prepares an issue on the evolution of human eyes; two articles are already downloadable on line; one of them by Michael Tomasello and his team. It defends a "cooperative eyes" hypothesis, according to which human eyes evolved to be white around the pupil, because it made our conspecifics' gaze more conspicuous, and hence allowed for increased cooperation in tasks involving joint attention. The function of human eyes would not only be seeing, but also sharing visual information. I offer a dissenting view on this remarkable experiment.

Pictures from Live Science show chimpanzee and human eyes.

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