John Wesley Powell Biography

John Wesley "Wes" Powell (March 24, 1834 – September 23, 1902) was a U.S. soldier, geologist, explorer of the American West, professor at Illinois Wesleyan University, and director of major scientific and cultural institutions. He is famous for the 1869 Powell Geographic Expedition, a three-month river trip down the Green and Colorado rivers, including the first known passage by persons of European descent through the Grand Canyon.