Kryptonite. Even beyond Superman's colourful world of heroes and villains, the word has become synonymous with our ultimate weaknesses. This glowing green mineral spells certain death for the otherwise indestructible Man of Steel--but it's also the only tangible link he has to his homeworld.

Kryptonite. Even beyond Superman's colourful world of heroes and villains, the word has become synonymous with our ultimate weaknesses. This glowing green mineral spells certain death for the otherwise indestructible Man of Steel--but it's also the only tangible link he has to his homeworld.