In 1,000,000 quarts of air there is one quart of krypton. An inert gas discovered in 1898 by Ramsay and Travers, krypton is scarcer and less volatile than argon, neon and xenon; its name means “the ...

The classic vision of Krypton as a scientific utopia has been deconstructed and reconstructed repeatedly by many Superman writers. Even the kindest of modern stories paint the planet as a cold, ...