• The article on ocean acidification (5 August, p 28) stated that over 130 species were recently found on one cold-water reef in the north-east Atlantic. In fact, over 1300 species were reported in a study that looked at a small selection of reefs.
• When we printed David Prichard’s letter (9 September, p 23) his name was spelled incorrectly as “Pritchard” and we moved him from his real address of Geraldton, Western Australia, to Geraldton, Washington, US.
• In our article “Uncovering the hazards in our electronic gadgets” (23 September, p 26) a decimal point was mistakenly entered as 0 in one of the entries in our table. The reading for decaBDE in the Apple laptop should have read 8.5 milligrams per kilogram, not 805 mg/kg.
