(NBC NEWS) Humans have witnessed many cataclysmic volcanic eruptions, from the one that destroyed Pompeii in 79 A.D. to the extraordinary Krakatoa eruption of 1883. But around the world right now there are about 20 so-called “supervolcanoes” that could outdo them all. – Scientists Hatch Bold Plan to Save Planet From Supervolcano – Sep.06.2017 https://www.nbcnews.com/mach/science/scientists-hatch-bold-plan-save-planet-supervolcano-