We are potentially just one eruption away from a horrifying global famine that could kill millions. It takes an absolutely massive amount of dust and ash to create the conditions that are necessary for a “volcanic winter”, and most volcanoes are simply not capable of releasing that much material. But when a “supervolcano” erupts, that is a completely different story. Scientists tell us that there are 20 supervolcanoes on Earth, but there hasn’t been a major eruption of any of them in any of our lifetimes. Unfortunately, seismic activity is on the rise all over the globe, and we are...