P is for Pronghorn
Pronghorn are the fastest runners in Yellowstone. When they need to, they can run at 70 miles per hour (113 kph) for three to four minutes. That's as fast as most cars go on the highway.
Did You Know?
Prior to the establishment of the National Park Service, the U.S. Army protected Yellowstone between 1886 and 1918. Fort Yellowstone was established at Mammoth Hot Springs for that purpose.