The world collapsed in an instant. Around—burned-out deserts, heaps of rubble, the skeletons of buildings, and twisted, busted concrete. A weak wind drives shadows and scraps of sound, and even the rare, dried-out bush looks like an ambush. The familiar mix of blood and brains is back on the menu. “That’s how it happened” doesn’t explain anything. But if you want to survive, you’ll have to dig for the cause—before this world cracks along with everything else.