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Entertainment 
From Peter Parker's run-in with a radioactive spider to Superman fleeing an exploding Krypton: comic book fans love a good origin story. So when 135,000 geeks and nerds invade San Diego next week for the 50th edition of Comic-Con -- the world's largest celebration of pop culture -- the event's humble beginnings will be a hot topic of discussion. The sprawling convention today draws Hollywood A-listers like Arnold Schwarzenegger, Patrick Stewart and the cast of "Game of Thrones" to its frantically hyped panels, where billion-dollar franchises are launched.
