The pronghorn is the fastest land mammal in the Americas. At top speed, they can hit 55 mph. But what are they running from?

When wildlife travelers (particularly safari fans) discuss the fastest animals in the world, a particular cat from the small cat lineage (Felinae) almost always enters the conversation: the cheetah.

It's the world's fastest land animal. But we won't see any records broken in the African bush where the cheetah thrives. That ...