Addendum to: Nature https://doi.org/10.1038/s41586-022-05564-6 Published online 11 January 2023

In our original article, we used laboratory flume experiments to demonstrate the effects of grain shape on bed load sediment transport. It has been brought to our attention that the paper did not include a comparison of the width-to-depth ratio of our flume experiments (approximately 0.1) with width-to-depth ratios of rivers in nature (typically >1). While this does not affect the results or conclusions in our paper, we note that it will be useful to test the grain shape theory presented in our paper in wide channels. We thank Thomas Pähtz, Yulan Chen, Jiafeng Xie, Peng Hu, and Zhiguo He of Zhejiang University; Rémi Monthiller of Aix Marseille University; Raphaël Maurin of Université de Toulouse; Katharina Tholen of Leipzig University; and Orencio Durán of Texas A&M University for pointing this out.