Cheetahs are the world’s fastest land mammal. These feline sprinters can accelerate from 0 to 60 miles per hour in three seconds flat. Explosive speed enables them to take down an antelope, but when they’re not hunting, cheetahs expend as little energy as possible.
In fact, researchers found that cheetahs burn about 2,000 calories per day -- the same as an average-size man. “I guess both humans and cheetahs rest a lot to offset high-energy activities,” biologist Johnny Wilson told National Geographic.
