Georges-Louis Buffon, an eighteenth-century French scientist, was the first to promote the widespread idea that nature in the New World was deficient; in America, which he had never visited, dogs don't bark, birds don't sing, and--by extension--humans are weaker, less intelligent, and less potent. Thomas Jefferson, infuriated by these claims, brought a seven-foot-tall carcass of a moose from America to the entry hall of his Parisian hotel, but the...