Nature article http://www.nature.com/news/2010/100520/full/news.2010.253.html http://www.nature.com/news/2010/100520/full/news.2010.253.ht... Nature asks and e

Nature article http://www.nature.com/news/2010/100520/full/news.2010.253.html http://www.nature.com/news/2010/100520/full/news.2010.253.ht... Nature asks and eight experts comment on significance http://www.nature.com/news/2010/100520/full/news.2010.255.html http://www.nature.com/news/2010/100520/full/news.2010.255.ht...