The News & Views article “Materials science: A desirable wind up” (Nature 454, 591–592; 2008), by Neil Mathur, considered work by D. Lebeugle et al. describing investigation of the multiferroic and magnetoelectric properties of single crystals of BiFeO3 Phys. Rev. Lett. 100, 227602; 2008). Coverage of closely related work by V. Kiryukhin and colleagues (S. Lee et al. Appl. Phys. Lett. 92, 192906; 2008), published just before that by Lebeugle et al., was inadvertently omitted from the article.