Researchers digitally reconstructed the skull of the ancient Hippopotamus creutzburgi, an extinct dwarf hippo of the Greek ...

There are two species of hippopotamus: the common river hippo (Hippopotamus amphibious) and the much smaller pygmy hippo (Choeropsis liberiensis). The hippo is one of the largest mammals on Earth. On ...

Fiona the hippo is all grown up. The almost-5-year-old Nile hippopotamus, once a mini heartthrob, now has long, jutting tusks – consistent with a hippo her age. Zoo officials say the tusks will never ...

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 ...