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The shortfaced bears turned out to be remarkably adaptable, undergoing radical changes to meet the demands of two changing continents. And yet, for reasons we don’t quite understand, their adaptability wasn’t enough to keep them from going extinct.   

Thanks to Fabrizio De Rossi and Studio 252mya for the Arctodus and Arctotherium illustrations. You can find more of their work here: https://252mya.com/gallery/fabriziod...

And thanks to Ceri Thomas for the Plionarctos and Arctotherium reconstructions! Check out more of Ceri's paleoart at   / alphynix   and http://nixillustration.com

Produced in collaboration with PBS Digital Studios:    / pbsdigitalstudios  

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References: https://docs.google.com/document/d/1E...