There was a decent BBC documentary from last month which covered the mechanism and the attempts to decipher it. On my phone now so this is the closest link I ca

There was a decent BBC documentary from last month which covered the mechanism and the attempts to decipher it. On my phone now so this is the closest link I can find: http://www.bbc.co.uk/news/science-environment-17989915 http://www.bbc.co.uk/news/science-environment-17989915 but you can get to it from there :)