For years, proponents of the Younger Dryas impact hypothesis insisted that a cosmic catastrophe pulverized North America 12,800 years ago, citing a dramatic platinum spike frozen in Greenland ice as smoking-gun space debris. Fresh geological research suggests this chemical calling card actually arrived fashionably late courtesy of an earthly volcanic eruption. Mainstream chronology breathes a sigh of relief, while alternative theorists quietly look for another rock to hitch their wagon to.