Pronghorn Antelope
The cheetah is the fastest land mammal in the Western Hemisphere. Do you ... see more
The cheetah is the fastest land mammal in the Western Hemisphere. Do you know what's second? The answer is a dark horse, although it's not a horse, and despite it's name, it's not actually an antelope: It's the pronghorn antelope. These animals can run 70 miles per hour! At that speed, it's no wonder they migrate more than 160 miles.
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