One Hundred Seconds Till The Apocalypse
Since 1947, the Bulletin of the Atomic Scientists has adjusted its Doomsday Clock to provide humanity with an expert estimate of just how close all of us are to an apocalyptic “midnight” -- that is, nuclear annihilation. A century ago, there was, of course, no need for such a measure. Back then, the largest explosion ever caused by humans had likely occurred in Halifax, Canada, in 1917, when a munitions ship collided with another vessel, in that city’s harbor. That tragic blast killed nearly 2,000, wounded another 9,000, and left 6,000 homeless, but it didn’t imperil the planet.