Authors: Xing Xu; James M Clark; Jinyou Mo; Jonah Choiniere; Catherine A Forster; Gregory M Erickson; David W E Hone; Corwin Sullivan; David A Eberth; Sterling Nesbitt; Qi Zhao; Rene Hernandez; Cheng-kai Jia; Feng-lu Han; Yu Guo Journal: Nature Date: 2009-06-18 Impact factor: 49.962