The duration of Earth's creation remains unknown. Elegant modelling of the Earth's core formation reaffirms that the bulk of accretion occurred within a few tens of millions of years, but another 100 million years or so were needed to finish the job.
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Elliott, T. Hard core constraints on accretion. Nature Geosci 3, 382–383 (2010). https://doi.org/10.1038/ngeo883
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DOI: https://doi.org/10.1038/ngeo883
