Correction to: Nature Reviews (2020) https://doi.org/10.1038/s42254-020-00260-8, published online 13 November 2020.

The originally published article incorrectly reported the title of the referenced paper. The correct reference is: Mossa, V. et al. The baryon density of the Universe from an improved rate of deuterium burning. Nature 587, 210–213 (2020).