A new dinosaur species looks set to solve an old evolutionary puzzle.
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References
Xu, X. et al. Nature 459, 940-944 (2009).
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Kaplan, M. Dinosaur's digits show how birds got wings. Nature (2009). https://doi.org/10.1038/news.2009.577
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DOI: https://doi.org/10.1038/news.2009.577