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

The Man of Steel is needed now has and always will be a symbol of humanity and hope, writes columnist LeBron Hill.

Superman is able to stop the meteor, but it breaks up and showers the Earth in Kryptonite. Superman Unlimited #1’s cover boasts that this is the beginning of the Emerald Age, and things change ...

Superman: The Kryptonite Spectrum is a 5-issue Black Label series by the Ice Cream Man creative team. Four new forms of Kryptonite are discovered, each with mysterious effects on Superman.

But just as Superman's classic writers made "real" kryptonite into something bigger than it deserved, so metaphorical kryptonite turns out to be more deflationary.

Superman's one weakness was kryptonite, but did you know the alien mineral didn't originally exist in the story? It was created for a completely mundane reason.

He is the author of "Superman: The Unauthorized Biography." On April 18, Superman will turn 75. Although still faster than a speeding bullet and more powerful than a locomotive, he's showing his age.

Superman #4 brings the Kryptonite Klaw to Metropolis, but can Supes expose Lex Luthor's secret past in time? Find out in this "shocking" issue!

Superman: The Kryptonite Spectrum pits the Man of Steel against against several new colors of Kryptonite with horrifying effects.

Kryptonite is a vital material for Superman and other Kryptonians. This includes pink Kryptonite, blue Kryptonite, gold Kryptonite and more such colorful rocks from the DC universe.