In Ron Howard's Angels & Demons Tom Hanks plays Harvard academic Robert Langdon, who discovers evidence of the resurgence of an ancient secret brotherhood called the Illuminati - the most powerful underground organization in history.
When Langdon finds evidence that the Illuminati have stolen antimatter from a secret laboratory at CERN, which they plan to use as a devastating weapon to destroy the Vatican, he and CERN scientist Vittoria Vetra begin a race against time to recover the antimatter and prevent catastrophe.
But what is antimatter? Is is real? Is it dangerous? What is CERN?
CERN is the European Organization for Nuclear Research - what's with the two names?
Large-scale annihilation of antimatter and matter could theoretically be used in a destructive way - but could it be used to make a bomb?
When antimatter comes into contact with matter it annihilates: the mass of the particle and its antiparticle are converted into pure energy. But can this energy be harnessed in some useful way?