The hippopotamus, also known as a hippo, is a massive amphibious mammal that spends most of its time near "lakes, pools, mudholes, or in the preferred moving waters of rivers," according to the San ...

Given their huge size, there is no question as to why hippopotamuses are one of the most feared mammals. Apart from their bulky appearance, they also have an odd-looking mouth that features huge, ...

COLORADO SPRINGS, Colo. — One of Colorado's cutest animals is growing up. Omo, a 21-month-old hippopotamus at Cheyenne Mountain Zoo, will soon weigh more than 1,000 pounds. The Colorado Springs zoo ...