March 7, 2008

It took eons to make Grand Canyon grand

The Grand Canyon often is referred to as about 6 million years old — but its western half actually began to open at least 17 million years ago, a University of New Mexico team reports Friday in the journal Science.

Wait: The western side of the canyon is the downstream end of the Colorado River, so how could it be older than the arguably more spectacular eastern side?


Read more.

No comments: