Whether on four paws, with fins, or wings, the animal kingdom moves at a rapid pace. Some animals seem to simply ignore the speed limit. But what is actually the fastest animal in the world? A ...

The fastest terrestrial mammal found in the Americas is the pronghorn. While it’s commonly called an American antelope, its ...

Explore the science of running, from Usain Bolt’s record-breaking speed to the incredible endurance of humans and animals, and discover what makes us built for distance. Mike Johnson scrambles to pass ...