Why is the North American pronghorn so fast?

The North American pronghorn is exceptionally fast due to its unique evolutionary adaptations that help it evade predators. It possesses a lightweight, aerodynamic body and long legs, enabling it to run at speeds of up to 55 miles per hour. Additionally, pronghorns have a high lung capacity and an efficient cardiovascular system, allowing them to maintain their speed over longer distances than most predators. These traits have developed because, unlike many other ungulates, pronghorns evolved without large predators, making speed a crucial survival mechanism.