The specialty evolved from general and cardiac surgery as well as minimally invasive techniques pioneered by interventional radiology. The vascular surgeon is trained in the diagnosis and management of diseases affecting all parts of the vascular system except those of the heart and brain.
More than 1,800 miles in 10 days! From St. Joseph, Missouri, to Sacramento, California the Pony Express could deliver a letter faster than ever before. In operation for only 18 months between April 1860 and October 1861, the Pony Express nevertheless has become synonymous with the Old West.
The Pony Express averaged 9 to 10 miles per hour over 15- to 25-mile stages, changing horses between stages. Many very long-distance rides, called endurance rides, have been completed on horses, in which the horse has to cover 100 miles in less than 24 hours. In the Middle East 26-mile races on horseback can be completed in around an hour.