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  1. Hippopotamus, facts and photos - National Geographic

  2. How Moo Deng the pygmy hippo is different from common hippos

  3. Hippopotamus - National Geographic Kids

  4. Hippo | Amazing Animals - YouTube

  5. 10 Hippo Facts! - National Geographic Kids

  6. National Geographic - Hippo Vs Croc - YouTube

  7. Hippos had found refuge in Uganda’s national ... - National Geographic

  8. Hippopotamus - The River Horses | World's Deadliest | National Geographic

  9. Hippos (National Geographic Kids Readers, Level 1) - Penguin …

  10. Moo Deng—a purple-pink pygmy hippo... - National Geographic

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