BBC footage shows male hippos fighting for dominance, sometimes for hours, in a brutal struggle for mating rights ...

You do not want to get on a hippopotamus’s bad side — it could be the last thing you do! These huge mammals can become vicious if provoked, and even though they haven’t been trained in martial arts, ...

An alpha hippo is challenged by two outside males. A coup by two hippo bulls is out of the ordinary, but this is no ordinary year, as a once-in-a-lifetime drought spurs unusual animal behavior. - ...

A Nile adult hippopotamus at the Cincinnati Zoo is said to be fighting for his life two weeks after caretakers discovered an infection in his blood. The hippo named Henry is the father of Fiona, which ...

A new pygmy hippo star has taken the internet by storm. A six-week-old pygmy hippo named Mars captured hearts worldwide when his mom gave him the universal "mom stare" after he refused to leave the ...