How Old Really Is Grand Canyon
( 01:04 )
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Find out how old the Grand Canyon really is. The Grand Canyon is approximately 280 miles long, and in some places it’s over a mile deep and 18 miles across. Controversy over the age of the Grand Canyon has been stirred up by a new study done by researchers from the University of Colorado and the California Institute of Technology, which says that the canyon is approximately 65 million years older than previous research suggests.

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