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| | Hippopotamus - MSN Encarta |
 | | Its bigger relative—known as the river or common hippopotamus or, simply, hippopotamus—is one of the world's largest and heaviest land animals, weighing up to about 4,000 kg (about 8,800 lb). |
 | | Although strictly a plant eater, the hippopotamus has massive jaws with formidable tusks. |
 | | The word hippopotamus comes from two Greek words that mean “river horse.” While hippos do live in rivers, they differ from horses in being artiodactyls, mammals with an even number of hoofed toes on each foot. |
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