• In a letter to New Scientist, Barbara Sommerville wrote that the more acceptable longer-term approach to population control is to “educate women and supply them with contraceptives”, but her reference to the specific efficacy of education for women disappeared in editing (5 March, p 32). Sorry.
• Science is never still in its pursuit of cosmic extremes. When Stephen Battersby filed his piece on the largest things in the universe (5 March, p 38) the biggest known planet was TrES-4. However, while it was in press, a new estimate was published of WASP-17b’s size, making it the biggest.
