The Greyhound is the fastest dog on earth, able to run more than 40 mph. But what makes a Greyhound so fast? And how does it compare to the fastest land animal, the cheetah? (Sorry, dog people, but cats do take the speed crown.)
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In this incredible video, BBC Earth Unplugged takes super slow motion video of two Greyhounds as they sprint. The Greyhound's stride is not that different from the cheetah's. They both employ a rotary gallop, a type of running technique where the paws strike the ground in a circular pattern. So then what makes the cheetah so fast? Watch to find out ...
H/t BBC Earth Unplugged
Featured image via Euclid Public Library 
