Gregory Smith March 16, 2019 8:48pm Remember that your pencils can dissipate waste heat instantly below -150C. Second sound. This is sure to come in handy someday. :P #physics #heat #cool #secondsound https://arstechnica.com/science/2019/03/mit-scientists-heat-can-act-like-sound-wave-when-moving-through-pencil-lead/ MIT scientists: Heat can act like sound wave when moving through pencil lead Exotic "second sound" phenomenon could one day help cool future microelectronics.