Have you ever heard of a horse chestnut tree? About 10 years ago, I was looking through a catalog from Forest Farm, a company that specializes in unusual trees and shrubs, and came across the horse ...

Once king of eastern forests, the American chestnut was wiped out by blight. Now it is poised to rise again. “They're hard to breed and easy to kill,” says plant pathologist Fred Hebard as he attacks ...