Photo: Cheetah chasing prey

Cheetah

Photograph by Chris Johns

The cheetah, holder of the animal kingdom's land speed record, can run at more than 60 miles an hour (96 kilometers an hour) and can reach its top speed in just three seconds. These champion sprinters rely on long, muscular legs to propel their lithe bodies. But cheetahs expend a tremendous amount of energy during a chase and can only run all out for about 900 feet (274 meters).