• The final quote in the story on brain waves (1 October, p 19) should have been attributed to Bernard Balleine at the University of Sydney.
• The DOI in the story linking epigenetic changes to schizophrenia and bipolar disorder (1 October, p 16) should have been 10.1093/hmg/ddr416.
• Paul Drayson, in the story on electric car racing (24 September, p 26), referred to the innovations that motorsport in general, not just F1, has brought to road cars.
