Another HN discussion on this news: http://news.ycombinator.com/item?id=1962846 http://news.ycombinator.com/item?id=1962846 And more HN discussion and a excell

Another HN discussion on this news: http://news.ycombinator.com/item?id=1962846 http://news.ycombinator.com/item?id=1962846 And more HN discussion and a excellent write up by PZ here: http://news.ycombinator.com/item?id=1963990 http://news.ycombinator.com/item?id=1963990 Also a write up by Bad Astronomy http://blogs.discovermagazine.com/badastronomy/2010/12/02/nasas-real-news-bacterium-on-earth-that-lives-off-arsenic/ http://blogs.discovermagazine.com/badastronomy/2010/12/02/na... And the related XKCD: http://xkcd.com/829/ http://xkcd.com/829/