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Scientific American

2019-07-01, 07:55
John Wesley Powell, Great Explorer of the American West


He was the first to survey the Colorado River, 150 years ago—and his ideas about water resources in that arid region were prescient



-- Read more on ScientificAmerican.com


https://blogs.scientificamerican.com/obs...ican-west/
www.chinaphonearena.com > Off The Wall > Tech & Science > [Sci-Am] John Wesley Powell, Great Explorer of the American West