John Wesley Powell was an American explorer, geologist, and ethnologist, best known for his daring expedition of the Colorado River through the Grand Canyon in 1869. Born on March 24, 1834, in Mount Morris, New York, he lost an arm during the Civil War but continued to pursue his passion for exploration and science. His journey helped to map the region and provided valuable insights into the geology and ecology of the American West. In addition to his explorations, Powell was a significant figure in the establishment of the U.S. Geological Survey and advocated for the conservation of natural resources. He also studied the cultures of Native American tribes, emphasizing the importance of understanding their relationship with the land. Powell passed away on September 23, 1902, leaving a lasting legacy in both science and exploration.