xenon

(Newser) - Levels of the gas xenon in the Earth's atmosphere are way lower—to the tune of 90%—than scientists believe they should be, prompting a mystery one calls "the missing xenon paradox." While some believe the gas escaped into space, many have argued it's in the...

(Newser) - A hard drive recovered from the Columbia shuttle disaster confirms an old theory about why people shake ketchup before pouring it, LiveScience reports. Astronauts on the craft were conducting a zero-gravity experiment with xenon, a gas, to study viscosity, but scientists feared the results were lost after Columbia burned up...