The Doomsday Clock now reads 85 seconds to midnight. The end of the world is closer than ever, it seems—if the metaphorical timer is to be believed. Managed by the Bulletin of Atomic Scientists with input from experts and Nobel Laureates, the clock was created in 1947 in response to the nuclear menace of the Cold War. But it now takes into account not only threats from nuclear arsenals, but rogue ...