[FOXNEWS] A super volcano is very different from the common conception of tall cones of rock and ash that occasionally catastrophically erupt.

Instead, it’s a vast space of collapsed crust that can cover hundreds of square kilometers.

Instead, vast quantities of searing magma and clouds of fumes would slowly crawl across the landscape — burying much of the United States under a thick coat of ash and lava.

In the case of Yellowstone, it’s enough to change the climate of the world for several centuries.

An event in Indonesia, about 75,000 years ago, named the Toba catastrophe, pumped some 4000 tons of hydrogen sulphide gas into the atmosphere along with about 2800 cubic kilometres of ejecta. This produced a global volcanic winter that lasted a decade.

Yellowstone isn’t expected to erupt any time soon. It appears to burst roughly once every 700,000 years. The most recent was 640,000 years ago, with other events 1.3 million years ago and 2.1 million years ago.
Well, they've got 60,000 years to figure it. They'll probably come up with something.
This is much more regular than cataclysmic comet impacts.