• Sunspot numbers have been declining since the 1990s, not the 1920s as stated in our article on their impact on European winter temperatures (17 April, p 7).
Letter: For the record
Published 12 May 2010
Issue no. 2760 published 15 May 2010
Published 12 May 2010
• Sunspot numbers have been declining since the 1990s, not the 1920s as stated in our article on their impact on European winter temperatures (17 April, p 7).
Issue no. 2760 published 15 May 2010