Dating the Universe has always been a tricky business with unsatisfying answers. Astronomers now have a better clock, based on radioactive uranium, that puts the age at around 12.5 billion years.
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Sneden, C. The age of the Universe. Nature 409, 673–675 (2001). https://doi.org/10.1038/35055646
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DOI: https://doi.org/10.1038/35055646
