Is the anomalously high electrical conductivity seen in part of Earth's mantle caused by protons derived from hydrous defects in the mineral olivine? Two groups investigate this possibility — and draw different conclusions.
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Hirth, G. Protons lead the charge. Nature 443, 927–928 (2006). https://doi.org/10.1038/443927a
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DOI: https://doi.org/10.1038/443927a
