Meet Andy Sachs. A million girls would kill to have her job. She's not one of them.

The Machairodontinae fossil record in South America is not very diverse. Until now, only the genus Smilodon (Smilodontini) has been reported, with likely a single species, S. populator. A second taxon ...

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Kitchener, A. C., Breitenmoser-Würsten, C., Eizirik, E., Gentry, A., Werdelin, Lars, Wilting, A., Yamaguchi, N., Abramov, A. V., Christiansen, P., Driscoll, C ...

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