Watch this unsettling video of an aggressive hippo with incredible speed chasing after a boat full of nervous tourists!

And, of course, all birds have feathers. Within those groups, there are endless species to discover and more mind-blowing facts about animals to uncover! Click through the gallery above to learn more.

UK law both requires and regulates experiments on animals. Any new drug must be tested on at least two different species of live mammal, one of which must be a large non-rodent. The way scientists ...

International Zebra Day is a reminder to celebrate not only the zebra’s beauty but also its critical role in the ecosystems ...

From vomiting to pooping, all the animal facts and behaviours left unmentioned in pet store brochures are shown here, in vivid detail, with sounds, video, and even games. There are 16 different ...

The playful North American river otter is equally at home in the water and on land. It makes its home in a burrow near the water's edge, and can thrive in river, lake, swamp, or estuary ecosystems.

The Lunar New Year, also known as the Chinese New Year, begins on a Wednesday and marks the Year of the Wood Snake.

This ubiquitous animal can be found from Canada to South America and, in the United States, from the East Coast to the Great Plains. Cottontails range from reddish brown to gray, but all feature ...