The cool molecular gas from which stars form has been detected in relatively ordinary faraway galaxies. The results point to a continuous fuelling of gas into the star-forming guts of assembling galaxies.
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Blain, A. Less greedy galaxies gulp gas. Nature 463, 745–746 (2010). https://doi.org/10.1038/463745a
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DOI: https://doi.org/10.1038/463745a