I missed that discussion, thanks, although this link is a better read than the bloomberg article. To add to this post though, there is an interview with one of

I missed that discussion, thanks, although this link is a better read than the bloomberg article. To add to this post though, there is an interview with one of the researchers (Lewis) on the BBC World Service Science in Action. Podcast is here: http://www.bbc.co.uk/podcasts/series/scia http://www.bbc.co.uk/podcasts/series/scia