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Nature 554, 412-413 (2018)
doi: https://doi.org/10.1038/d41586-018-02221-9
Updates & Corrections
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Correction 20 February 2018: In saying that everyday atomic hearts have equal protons and neutrons, the original version of this article didn’t take account of the fact that some elements, such as hydrogen and lithium, have uneven numbers of protons in their most abundant form. The text has been updated to clarify this.