Cover image
The common guppy, Poecilia reticulata, can adapt rapidly to different ecological environments, and shows stunning diversity in color, life history, and physiology. In this issue, the guppy shows remarkable variation in de novo mutation rate. (Cover illustration by Jacelyn Shu, jacelyndesigns{at}gmail.com, https://www.jacelyndesigns.com/. [For details, see Lin et al., pp. 1317–1324.])
