BBC Horizon Illusions - Is Seeing Believing? Video Quiz

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Published on Oct 19, 2010

For the answer and the full quiz visit:
http://www.bbc.co.uk/science/humanbod...

You're about to be shown some of the cleverest and most amazing optical illusions ever created.

Watch closely as there will be some questions along the way for you to answer. Be warned though, the illusions are designed to trick you.

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