He may be the biggest name in American art history that you've never heard of, but a new museum in Denver is hoping to change that. Clyfford Still was one of the country's leading abstract expressionists of the 20th century,…

In his backyard in Denver, Ray Tomasso calls paper making 17th-century-style recycling. His workshop is filled with boxes of old cotton rags, blue jeans, rag board and scraps of paper -- the perfect material for his art.

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