• Contrary to the caption for the map in our article on mass extinction, Jersey is one of the Channel Islands, and is not part of the UK (24 April, p 38).
• It is hydroxyl radicals, rather than ions, that would oxidise sulphur dioxide emitted from the Toba supervolcano (17 April, p 28).
• In our article on endurance, we mispelled the name of world record holder Stephane Mifsud (17 April, p 34).
