What Was the World's First Triboluminescent Technology?

Triboluminescence is light emitted by the mechanical stimulation of crystals. The first people to use it might have been a Native American tribe. Learn about the physics of glowing crystals and the people who used it. » 11/02/14 10:30am 11/02/14 10:30am

Supervolcanoes can erupt with pretty much zero warning

A single volcanic eruption wiping out life on entire continents isn't exactly a cheery thought, but at least we had the mild comfort that it would take as much as 200,000 years for one to erupt. Yeah, about that... » 6/03/12 3:00pm 6/03/12 3:00pm