The mineral jadarite has the same chemical composition as Superman’s weakness. It may be a problem for humans, too.

Superman's lack of weakness is actually his biggest weakness. Indeed, that god-like skillset makes him so across-the-board ...

The cast and crew of “Superman” opened up to CNN about their personal kryptonite, the key weakness for the iconic superhero, ...

Superman might've found romance with reporter Lois Lane, but the newest adaptation of the Man of Steel is getting no love ...

The connection between Superman and Kryptonite is so firmly established in American culture that “Kryptonite” has become ...

While domestic and overall global box office make "Superman" a summer hit, the DC superhero is struggling in some territories ...

Described as "Earth's kryptonite twin," jadarite is a rare and fascinating mineral that quickly caught the attention of ...

Black Kryptonite is one of the deadliest forms of Kryptonite in existence, and now it's back and worse than ever.

Superman faces a supercharged Toyman powered by Kryptonite in Superman Unlimited #3, hitting stores Wednesday with deadly ...