The geologist and explorer's own account of his perilous venture into one of the last unmapped portions of the cont
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In 1923, America paid close attention, via special radio broadcasts, newspaper headlines, and cover stories in popular m
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The Colorado River is in crisis. Persistent drought, climate change, and growing demands from ongoing urbanization threa
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Federal management of water is undergoing a change that involves a drastic reduction in the number of new water projects
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The Grand Canyon Monitoring and Research Center began long-term planning at its inception and, in May 1997, produced a L
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The second highest concrete-arch dam in the United States, Glen Canyon Dam was built to control the flow of the Colorado
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