P ronghorn antelopes are the fastest land animals in North America, clocking speeds of up to 55 miles per hour for a half mile, and 45 miles per hour for longer. Since they mostly run in response to ...

Add Yahoo as a preferred source to see more of our stories on Google. On Saturday we showcased the extraordinary speed of North American pronghorn, with footage that showed the animals easily ...

American pronghorns evolved speed millions of years before cheetahs, helping movement and survival in changing landscapes.

Everybody knows that a cheetah is the world’s fastest land animal. But what if you take the size of the animal into account? If you measure speed by body-length-per-second, a tiny mite about the size ...

Speed is one of nature’s most lethal weapons, and every continent has an animal built to outrun fear. This video ranks the seven continents by their fastest land animal, showing how each species uses ...

The fastest land animal in North America is the American pronghorn, and previously, researchers thought it evolved its speed ...

Wolves can attain speeds of 30-plus mph in bursts. But in an open chase they cannot come close to catching the planet’s second fastest land animal – the North American pronghorn. These elegant ...

In celebration of wildlife conservation, Six Flags Discovery Kingdom will be hosting its third conservation day of the year, this time honoring the fastest land animals — cheetahs. Sunday’s event, in ...

Speed in the animal kingdom comes in many forms, from powerful land sprints to lightning-fast dives beneath the waves. Whether it's in the air, on land, or through water, each species has evolved in ...

For 35 years, American zoologist Laurie Marker has been collecting and storing specimens in a cheetah sperm bank in Namibia, hoping conservationists never have to ...

Filmmaker Bertie Gregory's new documentary special captures the extreme challenges facing the world's fastest land animal. In his new documentary special, Bertie Gregory follows cheetahs during the ...