Authors: Michael Haslam; Adriana Hernandez-Aguilar; Victoria Ling; Susana Carvalho; Ignacio de la Torre; April DeStefano; Andrew Du; Bruce Hardy; Jack Harris; Linda Marchant; Tetsuro Matsuzawa; William McGrew; Julio Mercader; Rafael Mora; Michael Petraglia; Hélène Roche; Elisabetta Visalberghi; Rebecca Warren Journal: Nature Date: 2009-07-16 Impact factor: 49.962