'Sleeping dragon' may have been trying to stay warm while it snoozed.
References
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American Museum of Natural History, New YorkAmerican Museum of Natural History, New York
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Hopkin, M. Fossil dinosaur slept like a bird. Nature (2004). https://doi.org/10.1038/news041011-7
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DOI: https://doi.org/10.1038/news041011-7
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