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 ...

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 ...

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 ...

Hippos keep the nutrient silicon on the move through the East African environment. Each day, the giant grazers transport nearly half a metric ton of silicon, an important nutrient for both plants and ...

Hippos may look harmless, but their poop plays a deadly role in their ecosystem. This video explores how their waste can trigger dangerous chain reactions in rivers, affecting fish, other wildlife, ...

Hippos may appear inactive, but a recent study shows that they’re listening closely to their surroundings. Paul Souders via Getty Images Hippopotamuses are best known for their bumbling bodies, ...