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.
Pony Express stations were placed 10 to 15 miles apart. The riders rode them at. full gallop which was up to 15 miles. per hour (depending on the horse and terrain- I guess). If a conestoga wagon made. 15 miles in a day they made good time. I imagine a cattle drive only made about 15. miles in a day too.