Usually, dumping fish-killing garbage into rivers is a human’s job. But hippos seem to be doing it, too, through their routine mass pooping events. At least, that’s what a team of scientists in the ...

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Hippos may look lazy in the water, but their poop creates one of the deadliest natural threats in their environment. By releasing massive amounts of waste into rivers, they deplete oxygen levels and ...

Henry the hippo has said goodbye to the Dickerson Park Zoo in Springfield, Missouri and is now at the Cincinnati Zoo. Henry, 34, described as "one of the most charismatic animals at the zoo, is joined ...

Every day, thousands of hippos come to Kenya's Mara River. But they aren't there just to cool down — they also come to poop. As the hippos wallow, they collectively expel considerable quantities of ...

When not grazing on land, hippos like to keep cool by gathering in packed pools for up to 16 hours a day, and it takes more than some shifting bowels for them to leave again. The semi-aquatic ...

Hippopotamus excrement could be lethal for river fish, a new study says. In fact, it might be the reason why fish are dying in Kenya's Mara River. A common belief among ecologists is that agricultural ...

Hippos might seem harmless from a distance, but their poop plays a surprisingly dangerous role in river ecosystems. Here's how this natural waste can choke out fish, alter water quality, and even ...