It's a bird, it's a plane, NO! it's
Krypton was discovered in Britain in 1898 by Sir William Ramsay. Its was discovered by evaporating liquid air and the residue that was left, there it was. It is a colorless gas, exhibiting a whitish glow in a high electric field. It is used in high speed photography, it is used in light bulbs and in signs to make the glow brighter.