Heath Ledger locked himself in a hotel room for a month to prepare for his iconic role as the Joker in The Dark Knight
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There was a cable network called The Puppy Channel that, for 3 years, broadcast only broadcast footage of puppies playing.
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Before The Simpsons, Matt Groening drew cartoons for Apple computers.
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The most popular sport as a topic for a film is boxing.
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Before making Finding Nemo, the animation gurus at Pixar Studios had to take a graduate class in fish biology and oceanography.
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