Horizon2009-2010Episodes Episode guide

Back up to: Horizon

1. Is Everything We Know About The Universe Wrong?

   Investigating the discovery of what is ominously being called 'dark flow'.
2. Did Cooking Make Us Human?

   Horizon asks whether eating cooked food prompted changes that helped humanity evolve.
3. What Makes a Genius?

   A professor of mathematics asks if geniuses' brains are fundamentally different from his.
4. To Infinity and Beyond

   How infinity is older than time, bigger than the universe and stranger than fiction.
5. Don't Grow Old

   Looking at discoveries which suggest ageing is something flexible that can be manipulated.
6. Pill Poppers

   How much is really known about the medicines we take, and can they be trusted to work?
7. Why Do Viruses Kill?

   Horizon follows researchers attempting to unravel the many secrets of viruses.
8. The Secret Life of the Dog

   How research into dogs is giving scientists a greater understanding of human behaviour.
9. How Many People Can Live on Planet Earth?

   Sir David Attenborough investigates whether the world faces a population crisis.
10. How Long is a Piece of String?

    Alan Davies attempts to answer the proverbial question: how long is a piece of string?
11. Why Do We Talk?

    Horizon investigates speech, a phenomenon unique to humans, which remains a mystery.
12. Who Is Afraid of a Big Black Hole?

    What was there before the big bang? Black holes could hold the answer.
13. Fix Me

    Three people with untreatable conditions see if, within their lifetime, they can be cured.
14. The Secret You

    The search for answers to one of science's greatest mysteries: how do we know who we are?
15. Do I Drink Too Much?

    Addiction expert John Marsden explores our relationship with alcohol.