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 ...

We always enjoy history videos from [The History Guy] but they don’t always cover technology history. When they do, though, we enjoy them twice as much as with the recent video he posted on the ...