The chemical composition of stars that host small planets seems to be more varied than that of large planets. This finding may push back the clock for the start of rocky planets and of life around stars other than the Sun. See Letter p.375
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Fischer, D. Early start for rocky planets. Nature 486, 331–332 (2012). https://doi.org/10.1038/nature11199
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DOI: https://doi.org/10.1038/nature11199
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