Could giant mammals survive in the Jurassic Period? The macropredatory whale Livyatan and the other mammalian all-stars of the Cenozoic are dropped into the Jurassic Period, and we analyze how they'd survive. This speculative ecology video analyzes ten giant mammals and their diets, sizes, competitors, and threats if they were placed in the Jurassic Period. Smilodon, Megatherium, Livyatan, and others are ranked on a scale of 1 to 10 based on how they would adapt to their new ecosystem and reptilian rivals. Will these mammals thrive...or be eaten alive?
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