• We described the brightness of Iridium flares as “a magnitude of up to 9” (7 April, p 52). This would be invisible to the naked eye. Magnitude -9 would be very bright, and is what we should have printed.
• Peter Aggett is at the University of Central Lancashire in Preston, not at the University of Lancaster (“Babies overfed to meet flawed ideal”, 28 April, p 6)
We renamed Palouse Falls in Washington state, forgetting that the proper name is a misspelling of the French pelouse (21 April, p 49)
