Sergeant Reckless was the only animal ever awarded an official rank in the Marine Corps.
Explore 10 interesting facts about the short-lived mail service that helped transform the American West.
By analyzing a tiny fossil preserved in Yukon permafrost, scientists have been able to decode the genome of a horse that lived and died some 700,000 years ago.
In 1942, what many consider the last major cavalry charge took place in the Soviet Union.
A new DNA study suggests that different groups of people independently tamed horses starting 10,000 years ago.