Prehistoric Monsters Revealed

99% of all animal and sea creatures who ever lived have become extinct. Meet some of the most bizarre, including a strange amalgam of bird and sloth, a 7-foot shrimp, saber-toothed cats, mastodons, and wooly rhinoceros.

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HISTORY Channel brings you thousands of documentaries and series exploring the events and people that shaped our world, from ancient empires to modern warfare. Stream now commercial-free. Cancel anytime.

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