In the Maine woods, a towering giant could help save chesnuts

Thanks to Nat King Cole, it's hard not think of chestnuts without conjuring an image of them "roasting on an open fire, Jack Frost nipping at your nose." But these days, you'll be hard-pressed to find anyone roasting American chestnuts over an open fire. The trees and the nuts have all but disappeared. But now, scientists are excited about the discovery of an American chestnut ...