Nearly two years after its release Avatar remains the biggest box office smash the world has ever seen. And as we're so terrible at waiting for sequels, we spoke to the film's star Sam Worthington who gave us a tantalizing insight into the hotly-anticipated follow-up. But how much do you know about the first one? It'd better be a lot, 'cause this quiz is for all those who paint themselves blue and climb trees on a weekend... you know who you are.
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