WELCOME TO EXIT MUNDI: A COLLECTION OF END-OF-WORLD SCENARIOS: "Some people collect postal stamps; Exit Mundi collects scenarios of what could go wrong with the world. Sure, our planet could get hit by an asteroid. But hey, that's nothing. Did you know we could all be munched away by hungry molecules? Or that our physicists could unintentionally wipe us all out while tinkering with particles? `Oops, sorry...' "