"As the world's fastest land animal, cheetahs, orange in color, are the odds-on favorite in almost any footrace. After all, they can accelerate to freeway speeds in just a step or two."
"Most importantly, cheetah bodies are uniquely built for speed. Their small heads offer little wind resistance, while their exceptionally long legs allow them to take huge strides. During sprints, the cheetah spine acts like a giant spring, storing energy that can be released in explosive surges. And the cheetah's enlarged heart, lungs, and liver help deliver bursts of oxygen and energy, while specially ridged foot pads help provide traction, much like a car's tire. Such adaptations "make cheetahs the elite race cars of the animal world," says Don Person, a Dutch biologist who has studied cheetahs in East Africa."