1:00pm

Fri September 23, 2011
Research News

Solving The Riddle Of The Grand Canyon's Formation

The Grand Canyon may seem to be a simple case of "river carves rock," but to geologists, its formation is still puzzling. Ira Flatow and guests discuss the canyon's mysteries, and the scientific sleuthing being done to solve them--millions of years after the Colorado River carried off the evidence.

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