If you have access (i.e. from university or whatnot) the actual paper is now online at: http://www.sciencemag.org/content/early/2010/12/01/science.1197258.full

If you have access (i.e. from university or whatnot) the actual paper is now online at: http://www.sciencemag.org/content/early/2010/12/01/science.1197258.full.pdf http://www.sciencemag.org/content/early/2010/12/01/science.1...