Correction to: Nature https://doi.org/10.1038/s41586-020-2794-7 Published online 14 October 2020

In the version of this article initially published online, in the upper x-axis “Lookback time (Gyr)” of Fig. 3, tick marks and units were incorrectly shifted toward the left-hand side of the figure. The locations have now been corrected in the HTML and PDF versions of the article.