John Wesley Powell
Explorer
Explorer of the western U.S. who became the first person to study the Colorado rivers.
He displayed an interest in the natural sciences at an early age, taking field trips up the Mississippi.
His expeditions traversed some 900 miles on four boats from Wyoming to the Grand Canyon.
He married Emma Dean in 1862. The couple had one child.
Peter Skene Ogden was another key figure in the exploration of the American West.