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Hippos respond differently to the calls of familiar and unfamiliar hippos. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

At first, Chris Dutton and Amanda Subalusky had no idea why the fish were dying. At a bridge on the border between Kenya and Tanzania, they noticed that whenever the Mara River rose by a few feet, ...

This is equal parts disgusting and hypnotic. We’ve seen hippos using their tails to spray their poop around, but we’ve only seen it on land—and the hippo wasn’t pressed right up against glass. Let’s ...

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Like most creatures, hippos do not fancy being followed around by humans as they poop. But a robot boat carefully disguised as a crocodile? Why not. The Mara River in Kenya, home to 4,000 hippos, is ...