Pronghorns (commonly called "antelope") are fast because they once had to outrun cheetahs on the American plains. &...

Pronghorn

National Bison Range, Montana

Pronghorns (commonly called "antelope") are fast because they once had to outrun cheetahs on the American plains.  The cheetahs are gone from our landscape, but the pronghorn has retained its remarkable speed. Photo © copyright by Stephen Penland.

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