• Christine Maggiore’s daughter Eliza Jane died in 2005, not in 2003 as we suggested (20 June, p 32).
• The scale on our diagram showing the fraction of exposure to gamma radiation inside a building compared with that outside should have been labelled in the following order with the fractions 1/10, 1/20, 1/30, 1/40, 1/50, 1/80, 1/100 and 1/200 (11 July, p 8).
