Lake Toba Foto

It was the largest volcanic eruption of the last two million years—an estimated 5,000 times larger than Mount St. Helens’s 1980 blast, with enough lava to create two Mount Everests.
Roughly 74,000 years ago, Indonesia’s Toba supervolcano pumped massive amounts of sun-shrouding ash and gases into the atmosphere, cooling the planet, possibly devastating early humanity, and—a new study reveals—raining sulfuric acid on both poles.

: Supervolcano Rained Acid on Both Poles—But Wasn’t So Bad After All?