"1902Z"^^ . "Powell, John Wesley"@en . . "1834-03-24Z"^^ . . "American geologist" . "1902-09-23Z"^^ . "John Wesley Powell"@en . "1834Z"^^ . . . "John Wesley Powell (March 24, 1834 \u2013 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 Europeans through the Grand Canyon.Powell served as second director of the U.S."@en . .