Another documentary, on supervolcanoes. At the end they say a continent-wide volcanic extinction event happens about every 700,000 years somewhere in the world. And Yellowstone is the center of such events in the U.S. It could result in diminishing sun and killing farm crops, and thus starving millions to death. If large enough an event, most or all of human civilization.
"Naked science" sounds like some kind of weird porn for nerds.
