An ancient shark species once swam in the rivers of present-day South Dakota, researchers reported yesterday (January 21) in the Journal of Paleontology. The fossils came from the Hell Creek Formation ...
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HowStuffWorks on MSNThe Largest Carnivorous Dinosaur May Not Have Been T. RexLikewise, the word "carcharodontosaurid" roughly means "shark-toothed lizard" in Greek. Steve Brusatte is a paleontologist at ...
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