Researchers have shown that Mexico played an important role in the diversification of North American mammal species. This may explain why northern mammals were more successful migrants than their...
Tooth of Paranthropus robustus from Swartkrans, 1.8 million years old. Photo: Didier Descouens/Wikimedia
Analyses of dental enamel proteins from fossils of the early hominin Paranthropus robustus point to an unexpectedly...
