Hippopotamus (Hippopotamus amphibius)
The hippopotamus spends 18 hours a day in the water and can stay underwater for up to five minutes. Water helps keep the hippo cool and minimizes the weight of its massive body.
The hippopotamus spends 18 hours a day in the water and can stay underwater for up to five minutes. Water helps keep the hippo cool and minimizes the weight of its massive body.
Postmarked: August 1998
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