MICHAEL LONG / SCIENCE PHOTO LIBRARY MICHAEL LONG / SCIENCE PHOTO LIBRARY
Coryphodon (top) and Titanoides (bottom), illustration. These animals are both extinct prehistoric mammals, and both are examples of pantodonts, the early large mammalian browsers. Titanoides was a large bear-like herbivore. Reaching a body length of around 3 metres, it lived from 59 to 56 million years ago, during the Late Palaeocene. It lived in tropical swamplands in what is now North Dakota in North America. Coryphodon reached a body length of around 2.5 metres, and lived from 57 to 46 million years ago, from the Late Palaeocene to the Middle Eocene. It had a semi-aquatic lifestyle similar to the modern hippopotamus. It also inhabited North America.
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