• In our preview of books for 2014 (4 January, p 48) we missed a publisher’s title update. Superintelligence: The coming machine intelligence revolution should be Superintelligence: Paths, Dangers, Strategies. The author’s name, however, was always Nick Bostrom not Bostrum.
• The last ice age was 12,000 years ago, not 1200 years as stated in our look at archaeological finds revealed by shrinking glaciers (11 January, p 36).
