This blog is definitive. Reality is frequently inaccurate.
Wednesday, March 14, 2012
Kryptonite Found on Earth
Kryptonite, the only substance other than magic which can hurt Superman, has been located in a mine in Serbia. It contains the same chemicals as the formula used in Superman Returns: Sodium lithium born silicate hydroxide. However it's white and powdery, rather than green and glowing. And it isn't radioactive, at least, not so far as we of Earth can tell.