BBC: 'Kryptonite' discovered in mine

BBC NEWS | Science/Nature | 'Kryptonite' discovered in mine: "Kryptonite is no longer just the stuff of fiction feared by caped superheroes.

A new mineral matching its unique chemistry - as described in the film Superman Returns - has been identified in a mine in Serbia.

According to movie and comic-book storylines, kryptonite is supposed to sap Superman's powers whenever he is exposed to its large green crystals.

The real mineral is white and harmless, says Dr Chris Stanley, a mineralogist at London's Natural History Museum."