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Crocodiles existed 200 million years ago and have outlived most dinosaurs by 65 million years, yet modern crocodiles still match the fossils of their ancient ancestors. Their efficient body design, strong immune system, and adaptable behavior has helped them to survive.
Eastern hellbenders are a part of the ancient Cryptobranchidae family and their closest living relatives live in China and Japan. Hellbender fossils date back to more than 160 million years ago, a time when the dinosaurs still roamed the earth.
Rhinoceros are a part of the group called perissodactyls. Modern horses, zebras, and tapirs, also descended from this group. While perissodactyls did not live at the same time as the dinosaurs, they began their existence soon after, about 55 million years ago.