The Daily Galaxy has a great story about the hysterics that accompanied the moment when the Earth passed through the tail of Halley's Comet back in 1910, an already remarkable event (space is a very, very empty place) that was made all the more interesting by rampant rumors that the comet's tail contained cyanide gas and would kill everything on the planet.

Shea Gunther ( @sheagunther ) is a podcaster, writer, and entrepreneur living in Portland, Maine. He hosts the popular podcast "Marijuana Today Daily" and was a founder of Renewable Choice Energy, the country's leading provider of wind credits and Green Options. He plays a lot of ultimate frisbee and loves bad jokes.