I believe that this short piece appears in the 'Comments' section in the print edition of Nature. http://www.nature.com/nature/journal/v491/n7424/pdf/491325a.p

I believe that this short piece appears in the 'Comments' section in the print edition of Nature. http://www.nature.com/nature/journal/v491/n7424/pdf/491325a.pdf http://www.nature.com/nature/journal/v491/n7424/pdf/491325a....