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Well, the basic idea behind it is that it is material from his home planet... and on his own planet, he *isn't* a superhero... he's just normal. So, being around material similar to himself can take away his special powers. Now, of course there is a lot more to it through different Superman storylines, but that is the closest I can get to "why." ...
What else can I help you with?
What is super girl weakness?
Kryptonite
Is kryptonite real?
No, kryptonite is a fictional material. However, in 2007, scientists in Siberia discovered a mineral with almost the same chemical composition as the fictional kryptonite.
What is ultimate Supermans weakness?
super kriponite aouto maticcly kills him
What are superman's weakness and strenght?
His weakness is famously kryptonite, and his strengths include super strength, super ,speed, super durability, and super senses.
How are the red and green kryptonite effects different?
Green kryptonite causes weakness while red kryptonite has different side effects with every exposure.
Is kryptonite Superman's weakness?
Kryptonite is Superman's weakness.
Does Superman have a child with Lois Lane and is Superman Returns part of the real story?
yes they do have a kid together. supermans son is superboy and he has no weakness to kryptonite because superman conceived with a human
What is supergirl's weakness?
Kryptonite
What is doomsday's weakness?
kryptonite
What is super mans weakness?
Kryptonite
What is super girl weakness?
Kryptonite
What is Superman's flaw?
His weakness to Kryptonite .
Is kryptonite real?
No, kryptonite is a fictional material. However, in 2007, scientists in Siberia discovered a mineral with almost the same chemical composition as the fictional kryptonite.
What is ultimate Supermans weakness?
super kriponite aouto maticcly kills him
What are superman's weakness and strenght?
His weakness is famously kryptonite, and his strengths include super strength, super ,speed, super durability, and super senses.
On the show Smallville what is Clark kent's weakness?
Clark Kent's weakness in Smallville is Kryptonite
How are the red and green kryptonite effects different?
Green kryptonite causes weakness while red kryptonite has different side effects with every exposure.
