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Is Everything We Know About The Universe Wrong?
Investigating the discovery of what is ominously being called 'dark flow'.
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Did Cooking Make Us Human?
Horizon asks whether eating cooked food prompted changes that helped humanity evolve.
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What Makes a Genius?
A professor of mathematics asks if geniuses' brains are fundamentally different from his.
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To Infinity and Beyond
How infinity is older than time, bigger than the universe and stranger than fiction.
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Don't Grow Old
Looking at discoveries which suggest ageing is something flexible that can be manipulated.
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Pill Poppers
How much is really known about the medicines we take, and can they be trusted to work?
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Why Do Viruses Kill?
Horizon follows researchers attempting to unravel the many secrets of viruses.
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The Secret Life of the Dog
How research into dogs is giving scientists a greater understanding of human behaviour.
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How Many People Can Live on Planet Earth?
Sir David Attenborough investigates whether the world faces a population crisis.
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How Long is a Piece of String?
Alan Davies attempts to answer the proverbial question: how long is a piece of string?
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Why Do We Talk?
Horizon investigates speech, a phenomenon unique to humans, which remains a mystery.
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Who Is Afraid of a Big Black Hole?
What was there before the big bang? Black holes could hold the answer.
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Fix Me
Three people with untreatable conditions see if, within their lifetime, they can be cured.
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The Secret You
The search for answers to one of science's greatest mysteries: how do we know who we are?
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Do I Drink Too Much?
Addiction expert John Marsden explores our relationship with alcohol.