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Hippopotamus - Wikipedia
Hippopotami in Ancient Egypt - The Metropolitan Museum of Art
Hippopotamidae - Wikipedia
Hippopotamus, facts and photos - National Geographic
Hippopotamus: Habitat, Behavior and Diet - ThoughtCo
Hippopotamus - Hippo Facts, Pictures & Information - Animal …
Hippopotamus | Diet & Facts | Britannica
Hippopotamus | African Wildlife Foundation
Hippopotamus | Species | WWF - World Wildlife Fund
Hippopotamus - Simple English Wikipedia, the free encyclopedia