Uncover the secrets of Kryptonite, Superman's ultimate weakness! Learn how this radioactive "bling" from Krypton impacts the ...

Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. Superman ’s only major weakness—aside from bright red capes—is kryptonite.

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 has used White Kryptonite to fend off dangerous alien plants and heal himself from a variant of the deadly Virus X. Not long after, Supergirl contracted the illness, and Superman used ...

Jadarite—commonly known as kryptonite due to its chemical similarity to the mineral bane of Superman—has only every been found in a deposit in northern Serbia. Now, scientists have deciphered ...