• We played a little fast and loose with our units by saying cheetahs “accelerate up to 3 metres per second and decelerate by 4 mps in a single stride” (15 June, p 18). The units should of course have been metres per second per second (m/s2)
• It was a case of nominative misdescription in Feedback’s look at scam conferences (15 June). Marine biologist Phil Clapham, not Phil Graham, informed us of his spoof paper on using giant rodents to generate power
