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Wednesday, Aug. 20, 2014
National Geographic explorer-in-residence Paul Sereno, enveloped by the jaws of "SuperCroc," holds the fossil head of "DogCroc." DogCroc, along with four other newly described crocs, lived in the Sahara when the eight-ton SuperCroc did, at a time when dinosaurs ruled. (Mike Hettwer ~ National Geographic)