A new Imperial College London study has answered a long-held question about why medium-sized land animals like cheetahs tend to be fastest. There's a discrepancy in the animal kingdom. While many key ...

A cheetah sprinting across the savanna can look almost unreal in motion. The animal starts low in the grass, completely focused, then suddenly launches into a chase at astonishing speed. That ...

Lifespan, strength, and brain size tend to increase with an animal's size, yet speed does not. The largest land animal, the elephant, wouldn't come close to catching the fastest land animal, the ...

A well-known cheetah took on a leopard to protect her one remaining cub. ©nwdph/Shutterstock.com They may grow into the world's fastest mammal, but cheetah cubs aren't nearly so speedy. A video from ...