• Discussing whether animals think like autistic savants (23 February, p 8) we said that using the right hemisphere allowed birds to process only categorical features of a scene, and using the left meant they could attend only to the details of a stimulus. In fact the right hemisphere processes details and the left processes categorical features.
• The reference to the paper by Josh McDermott and Marc Hauser on monkeys’ musical motivation (23 February, p 29) should have been Cognition, vol 104, p 654.
• The reference to the paper “Discovery of a Jupiter/Saturn analog with gravitational microlensing” by Scott Gaudi and colleagues (23 February, p 17) should have been Science, vol 319, p 927.
• We described Leonore Tiefer, at the New York University School of Medicine, as a psychiatrist (23 February, p 6); she is a psychologist.
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