News From the Field
More Evidence for an Ancient Grand Canyon
November 29, 2012
For over 150 years, geologists have debated how and when one of the most dramatic features on our planet--the Grand Canyon--was formed. New data unearthed by researchers at the California Institute of Technology builds support for the idea that conventional models, which say the enormous ravine is 5 to 6 million years old, are way off.
California Institute of Technology
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