Correction to: Nature Reviews Molecular Cell Biology, published online 14 September 2022.

In the version of this article initially published, there were errors in Figs. 1, 2 and 4. In Fig. 1c, the “Piwi” and “Armi” bodies were placed incorrectly and have been shifted closer to the 52 end, and in the last sentence of the Fig. 1 legend, “H3 Lys4” replaces “H3 Lys9.” In Fig. 2b, middle-left section, the label “MILI, MIWI” appeared originally as “MILI, MIWI2,” and in Fig. 2c, the scissors on the left-hand side were placed incorrectly to the left of “U” and now appear on the right of U, closer to the 52 end. In Fig. 4a and b, “Translation activation” sections, the label now reading “PABP” appeared initially as “PABP1”, and vice versa. The changes have been made to the HTML and PDF versions of the article.