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No Methane on Mars, Cilantro Cleans Drinking Water, Chemical Weapons

Mars rover Curiosity does not find evidence of methane on Mars. And, how Cilantro provides a cheap way of cleaning drinking water. Plus,
how to get rid of chemical weapons.

Methane could indicate microbial life on Mars, if it is there. But so far, Mars rover Curiosity has not found any evidence for it. Could this mean life has never existed on Mars after all?

Syria has agreed to destroy its chemical weapon stocks, but this is not going to be easy. Dr Joanna Kidd from King's College London, discusses the use of chemical weapons through the ages and Alistair Hay tells us what it may take to clean up Syria’s chemical weapons.

Deep brain stimulation involves electrically stimulating deep inside the brain using a pacemaker under the skin in the chest. It’s now used to treat severe, chronic pain, previously untreatable depression and the tremors of Parkinson’s disease. But how does it work?

(Image: Planet Mars. Credit: J. Gabás Esteban)

50 minutes

Chapters

  • Curiosity does not find methane on Mars

    Has there not been life on Mars after all?

    Duration: 09:50

  • Cilantro

    A cheap way to clean drinking water

    Duration: 03:06

  • Chemical weapons

    What will it take to clean up Syria’s chemical weapons?

    Duration: 10:30

  • Deep Brain Stimulation

    Using Deep Brain Stimulation as treatment for chronic pain

    Duration: 10:30

  • Time Perception in small animals

    Escape in small animals aided by slowed down perception of time

    Duration: 03:47

  • Weather forecasting app

    Smart phone app that can help forecast the weather

    Duration: 06:32

  • Voyager art project

    A new message for alien life!

    Duration: 05:55

Broadcast

  • Sun 22 Sep 2013 14:06GMT

Podcast