Prabhat Misra's post on Goodwall - Modern #birds capable of flight all have a specialized wing structure called the #propatagium without which they could not fly. The evolutionary #origin of this structure has remained a mystery, but new research suggests it evolved in #nonaviandinosaurs. The finding comes from statistical analyses of arm joints preserved in fossils and helps fill some gaps in knowledge about the origin of #birdflight. https://www.sciencedaily.com/releases/2023/02/230224135058.htm