The chemical content of a star that was born relatively shortly after the formation of the Milky Way calls into question conventional understanding of how stars formed in the early Universe.
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Cowan, J. One of the first of the second stars. Nature 488, 288–289 (2012). https://doi.org/10.1038/488288a
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DOI: https://doi.org/10.1038/488288a
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