The origin story of Hells Canyon, North America's deepest river gorge, has long been unclear to scientists. But new research estimates it formed about 2.1 million years ago when a dramatic flood event ...
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Grand Canyon’s “Forbidden Zone”: For 100 Years, the Smithsonian Denied It - Now a Ranger Says He Found Proof
Every good American mystery has a dateline. This one starts in April 1909. According to a century-old story in the Arizona Gazette, an explorer named G.E. Kincaid supposedly found a high-wall cave in ...
The marvels of the Grand Canyon extend beyond its dramatic scenery. Underground, vast cave systems hold clues to the region’s future climate.
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