“Michael Borowitz, at the Johns Hopkins University School of Medicine in Baltimore, Maryland, says: ‘The shapes of the major clusters are often similar but in any system there is noise, and those noisy dots are in the same place too. That’s hard to explain by biology. It is very difficult for me to believe that these were independent experiments.'” Details here: http://www.newscientist.com/article.ns?id=dn8230.