Kansas is full of light air

How to make irony: First, know that Kansas is the leading producer of helium on Earth, providing 2/3 of the global supply. Second, understand that most of the helium on Earth comes from a) the breakdown of radioactive nuclei; a process which takes tens of thousands to millions and even billions of years, and b) the Big Bang, 13.7 billion years ago. Third, note that both these timescales are > 6000 years. Fourth, mix all the above ingredients. Shake well, and enjoy the delicious irony.