Correction to: Nature Machine Intelligence https://doi.org/10.1038/s42256-020-00263-1, published online 30 November 2020.

It has come to the authors’ attention that the claims in the paper about automatically optimizing the robot’s body shape and control policy in simulation before transferral to the physical robot are unsupported by the data. All other data and claims related to the physical robot remain intact. We have removed the automatic optimization data and made edits and deletions throughout the article. See Supplementary Information for a list of changes and an uncorrected, original version of the article for reference.