The chemical diversity of the oldest stars is greater than we thought. The discovery of an extremely iron-poor star with a 'normal' ratio of carbon to iron challenges our perception of early chemical enrichment. See Letter p.67
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Norris, J. A hint of normality at last?. Nature 477, 37–39 (2011). https://doi.org/10.1038/477037a
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DOI: https://doi.org/10.1038/477037a
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