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Even the head of a cheetah is perfectly adapted for speed:
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Cheetahs are aerodynamically built for speed and are the fastest land mammal. At top speed, they advance 23 feet (7 meters) in a single stride and complete four strides per second. That top speed averages between 60 and 70 miles per hour (96 and 112 kilometer per hour) and can be maintained for only about 300 yards (274 meters). Cheetahs can accelerate from zero to 45 miles per hour (zero to 72 kilometers per hour) in just 2.5 seconds. No other land mammal surpasses their short sprints.
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Large nostrils and lungs provide quick air intake that allows cheetahs to breathe more easily while running and suffocating their prey.
