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Letter: For the record

Published 28 July 2010

•Muons are not larger than electrons, but they are more massive (10 July, p 10).

• Preying has nothing to do with it: the poster boy of risky sex is the male praying mantis (3 July, p 36).

• In our diagram of an optical illusion, the inner circles were not identical as claimed. In two of the four images, the pattern was horizontally displaced (10 July, p 28).

Issue no. 2771 published 31 July 2010

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