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Horizon explores the strange and wonderful world of illusions - and reveals the tricks they play on our senses and why they fool us. We show how easy it is to trick your sense of taste by changing the colours of food and drink, explain how what you see can change what you hear, and see just how unreliable our sense of colour can be. But all this trickery has a serious purpose. It's helping scientists to create a new understanding of how our senses work - not as individual senses, but connected together.
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Sign in to syncEpisode 1: Back from the Dead
Episode 2: The Death of the Oceans?
Episode 3: What Happened Before the Big Bang?
Episode 4: Is Seeing Believing?
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Episode 5: Miracle Cure? A Decade of the Human Genome
Episode 6: Asteroids - The Good, the Bad and the Ugly
Episode 7: Deepwater Disaster - The Untold Story
Episode 8: What Is One Degree?
Episode 9: What Is Reality?