Powell, John Wesley (1834-1902), was an American explorer, geologist, and biologist. He is known as an explorer of the Colorado River, an expert on the arid lands of the West, and an early environmentalist.
Powell, John Wesley (1834-1902), was an American explorer, geologist, and biologist. He is known as an explorer of the Colorado River, an expert on the arid lands of the West, and an early environmentalist.