Supported by Hundred Talents Project of the Chinese Academy of Sciences, National Natural Science Foundation of China (Grant Nos. 40125006, 40472018);Na-tional Basic Research Program of China (Grant No. 2006CB806400)
Recent fossil discoveries have substantially reduced the morphological gap between non-avian and avian dinosaurs, yet avians including Archaeopteryx differ from non-avian theropods in their limb proportions. In partic...