Victor Polyak

Mar. 07, 2008

How Old is the Grand Canyon?

New research gives a date to the start of the formation of the Grand Canyon -- 17 million years ago.

geology, speleology, caves, grand canyon, erosion

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Michael Pollan Talks Plants and Food

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Building Bridges From Plastic Shampoo Bottles

A New Jersey company transforms plastic waste into beams sturdy enough to support tanks and trains.

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