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Beskrivelse
The swiftness of a speeding bullet. The spiderlike ability to cling to any surface. Razor-sharp claws that slice through metal. Superheroes intrigue us with their amazing powers. They inspire us with their noble battle against the forces of evil. Mostly, they make us wonder, "How do they DO that?" Put comic book legends to the test to find out whether their heroics are science--or just science fiction.