Correction to: Nature Astronomy https://doi.org/10.1038/s41550-021-01380-6, published online 14 June 2021.

In the version of this Article originally published, in the Acknowledgements funding from the National Basic Science Data Center had mistakenly not been included; the following sentence has now been added: “This work is partially supported by the cosmology simulation database (CSD) in the National Basic Science Data Center (NBSDC-DB-10, no. 2020000088).”. Furthermore, in the Supplementary Information file, in the caption of Supplementary Fig. 1 the colours used to describe the nearly parallel and nearly perpendicular filaments were the wrong way around; the correct text should have read “The distribution of significance (with respect to the random) for filaments that are inclined nearly parallel (cosϕ > 0.95, in orange) and nearly perpendicular (cosϕ < 0.05, in blue) to the line of sight.”. All versions of the Article have been amended and the Supplementary Information file replaced.