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Is anyone else having problem accessing the paper? The link on Science isn't working, and the DOI I managed to find in the rest of the coverage doesn't seem to exist. I can't find the paper anywhere.

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Same. The reference appears to be "Depleted carbon isotope compositions observed at Gale crater, Mars, Proceedings of the National Academy of Sciences(2022). http://doi.org/10.1073/pnas.2115651119" DOI is not working yet but this is normal, however the link to PNAS seems broken indeed: https://www.pnas.org/content/119/4/e2115651119

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