• We misspelled Xiao-Wei Chen’s name in our report on the production of carbon nanotubes in volcanic rock (17 February, p 23). Sorry.
• The correct name of the lead researcher in the news item on cowbirds (10 March, p 14) is Jeffrey Hoover.
• Feedback referred to a non-alcoholic “beer” for dogs as “Keispelbier”, which is meaningless (17 February). It should have been “Kwispelbier”.
