The Cheetah is the fastest land mammal in the world. It can run from 0 to 62 miles per hour in 3 seconds. One reason it goes so fast is that it has a flexible spine. It also has a deep chest which has huge lung sacks, making it able to breath in more oxygen, Finally, it has claws that can't retract, providing traction. This allows the Cheetah to bring down a Thomson's Gazelle faster than a Lion could. Sadly, there aren't many Cheetahs around these days. One reason they are endangered is because it's hard for even a Cheetah to know that the Cheetah it's mating with could be his sister. Tasmanian Devils are in the same crisis known as inbreeding. Africa may be a huge continent, but the Cheetah populations are pretty small.