... As the area of sub-700mb atmospheric pressure slid over the Tetons and down into the Yellowstone Caldera, an enormous weight was lifted. Like a curious bear

... As the area of sub-700mb atmospheric pressure slid over the Tetons and down into the Yellowstone Caldera, an enormous weight was lifted. Like a curious bear pushing aside the stone on the lid of a bottomless box swarming with a quadrillion angry bees, a trillion tons of ash exploded into the stratosphere. Within hours, half of humanity lay sprawled under a smothering blanket of doom ...