Horizon, 2009-2010 Episode guide

  1. Is Everything We Know About The Universe Wrong?

    Investigating the discovery of what is ominously being called 'dark flow'.

    First broadcast: 09 Mar 2010

  2. Did Cooking Make Us Human?

    Horizon asks whether eating cooked food prompted changes that helped humanity evolve.

    First broadcast: 02 Mar 2010

    Image for Did Cooking Make Us Human? Not currently available on BBC iPlayer
  3. What Makes a Genius?

    A professor of mathematics asks if geniuses' brains are fundamentally different from his.

    First broadcast: 17 Feb 2010

    Image for What Makes a Genius? Not currently available on BBC iPlayer
  4. To Infinity and Beyond

    How infinity is older than time, bigger than the universe and stranger than fiction.

    First broadcast: 10 Feb 2010

  5. Don't Grow Old

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

    First broadcast: 03 Feb 2010

    Image for Don't Grow Old Not currently available on BBC iPlayer
  6. Pill Poppers

    How much is really known about the medicines we take, and can they be trusted to work?

    First broadcast: 20 Jan 2010

    Image for Pill Poppers Not currently available on BBC iPlayer
  7. Why Do Viruses Kill?

    Horizon follows researchers attempting to unravel the many secrets of viruses.

    First broadcast: 13 Jan 2010

    Image for Why Do Viruses Kill? Not currently available on BBC iPlayer
  8. The Secret Life of the Dog

    How research into dogs is giving scientists a greater understanding of human behaviour.

    First broadcast: 06 Jan 2010

    Image for The Secret Life of the Dog Not currently available on BBC iPlayer
  9. How Many People Can Live on Planet Earth?

    Sir David Attenborough investigates whether the world faces a population crisis.

    First broadcast: 09 Dec 2009

    Image for How Many People Can Live on Planet Earth? Not currently available on BBC iPlayer
  10. How Long is a Piece of String?

    Alan Davies attempts to answer the proverbial question: how long is a piece of string?

    First broadcast: 17 Nov 2009

    Image for How Long is a Piece of String? Not currently available on BBC iPlayer
  11. Why Do We Talk?

    Horizon investigates speech, a phenomenon unique to humans, which remains a mystery.

    First broadcast: 10 Nov 2009

    Image for Why Do We Talk? Not currently available on BBC iPlayer
  12. Who's Afraid of a Big Black Hole?

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

    First broadcast: 03 Nov 2009

  13. Fix Me

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

    First broadcast: 27 Oct 2009

    Image for Fix Me Not currently available on BBC iPlayer
  14. The Secret You

    The search for answers to one of science's greatest mysteries: how do we know who we are?

    First broadcast: 20 Oct 2009

    Image for The Secret You Not currently available on BBC iPlayer
  15. Do I Drink Too Much?

    Addiction expert John Marsden explores our relationship with alcohol.

    First broadcast: 13 Oct 2009

    Image for Do I Drink Too Much? Not currently available on BBC iPlayer

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.

Added. Check out your playlist Dismiss