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Hosted on MSNPhysicist Finally Solves the Mystery Behind Strange Polka-Dot Patterns Found in the Grand CanyonA region north of the Grand Canyon is riddled with mysterious spots and the expert came up with the most probable cause of it ...
No single spot provides a view of the whole canyon. Its scale disguises its fragility, says Roger Clark of the Grand Canyon Trust ... tracking our progress via satellite texts we’d been ...
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