National Hippo Day (Feb. 15) got its start on Second Life, an online virtual world where the hippo is a hero or sorts as well as the unofficial mascot. However, even if you've never been a Second Life ...

For the first time in 26 years, the Los Angeles Zoo welcomed the birth of a healthy baby hippopotamus as a surprise Halloween treat. The zoo’s female hippopotamus, Mara, went into labor around 1 ...

A rare pygmy hippo calf was born at the San Diego Zoo on Wednesday—the first surviving hippo birth at the zoo in over a decade. The little hippo weighs about 12 pounds and was born to its mother, ...