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  1. Hippopotamus, facts and photos - National Geographic

  2. Hippopotamus - National Geographic Kids

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

  4. Hippo | Amazing Animals - YouTube

  5. 10 Hippo Facts! - National Geographic Kids

  6. Proof African Hippos Do What They Want - National Geographic

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

  8. A school of hippos gives an aggressive warning sign - YouTube

  9. hippo Archives - National Geographic Kids

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