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Kissing, and missing, human cousins

DNA paints a contested picture of Stone Age interbreeding

2012 SCIENCE NEWS TOP 25: 14

The scientific paparazzi who followed long-gone evolutionary celebrities this year exposed plenty of hanky-panky between early humans and closely related species. These new findings (inexplicably ignored by supermarket tabloids) raise questions about how much genetic swapping happened in the Homo genus tens of thousands of years ago. What’s more, the mixed-up family tree is uprooting the popular view that modern humans evolved in Africa and spread from there, edging out close relatives such as Neandertals.

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