In 1930, Hungarian Imre Bródy filled lamps with krypton gas rather than argon, and designed a process to obtain krypton from air.

On January 30, 2006, a cylinder of krypton gas exploded at the company's Jacksonville facility.

The outer pane reflects the heat into the room, and krypton gas is sealed between them for insulation.

Modern windows also have optional gases between the panes that have higher insulative qualities than air, such as argon or krypton gases.

The metre is defined as 1,650,763.73 wavelengths in a vacuum of krypton gas.

Bródy in 1930 filled lamps with krypton gas in lieu of argon.

Those spaces are then filled with krypton gas - which is heavier than argon and thus better at insulating.

His idea was first used between 1960 and 1983, when a meter was defined as a wavelength of light from krypton gas.

So far, American intelligence has picked up almost no sign of the telltale krypton gas that is released into the atmosphere when nuclear fuel rods are converted into weapons-grade plutonium.

And, as in the case of the krypton gas, that evidence sometimes seems to appear, then disappear.