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_Microraptor zhaoianus_

Tomorrow's Nature contains a paper on "The smallest known non-avian theropod 
dinosaur."  Xing Xu, Zhonghe Zhou and Xiaolin Wang report on _Microraptor 
zhaoianus_ as "the first mature non-avian dinosaur to be found that is smaller 
than _Archaeopteryx_, and it eliminates the size disparity between the earliest 
birds and their closest non-avian theropod relatives."  There are "large 
patches of integuments...preserved in situ around the skeleton."  "Some pedal 
features of _Microraptor_ are consistent with an arboreal habit."