The lack of a coherent quantum description of gravity has impeded our understanding of the physics that determined how the Universe began. A synthesis of recent ideas may take us a step farther back in time.
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Bojowald, M. Original questions. Nature 436, 920–921 (2005). https://doi.org/10.1038/436920a
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DOI: https://doi.org/10.1038/436920a