MAKE SURE THERE’S AN EASY-TO-TRIGGER SPRINKLER SYSTEM IN SKYNET’S BUNKER: This Circuit Board Will Self-Destruct in 5, 4, 3… “A pair of engineers at Vanderbilt University has constructed simple circuit boards, including conductive traces and capacitors, that work above room temperature but rapidly disintegrate when cooled below 32°C (89°F).”