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.

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

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 ...

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 ...

Did you know that 2 billion people celebrate the Lunar New Year, and that hippopotamuses can't swim at all? Learn more with our fun facts of the day!

Tyrannosaurus rex was one of the most ferocious predators to ever walk the Earth. With a massive body, sharp teeth, and jaws so powerful they could crush a car, this famous carnivore dominated the ...