Word: tritylodontoid
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Geologist Lewis chiseled out some blocks of rock and headed back to his laboratory. In one of the chunks he found a paleontological El Dorado: the skull of a part-reptile, part-mammal tritylodontoid, a transitional creature that lived about 165 million years ago when mammals were just evolving from reptiles. Only a few small tritylodontoid fragments have been found in the old world; none at all had been found in the new world...
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