Correction to: Nature https://doi.org/10.1038/s41586-018-0388-4, published online 08 August 2018.

In this Letter, owing to a production error, the arrows in the middle panel of Fig. 1 were wrongly coloured. In the Fig. 2 legend, “a single \(({}^{130}{X}_{{\rm{d}}}^{{\rm{k}}}),\hspace{2.77626pt}\beta \) pair” should read “a single \(({}^{130}{X}_{{\rm{d}}}^{{\rm{k}}},\hspace{2.77626pt}\beta )\) pair” and “10−10 Gyr−1 and 10−8 Gyr−1” should read “10−10 yr−1 and 10−8 yr−1”. In the second sentence after equation (2) and in the legend to Extended Data Fig. 3, four instances of “Gyr−1” should read “yr−1”. These errors have been corrected online.