• In our technology trends story on voice recognition (9 April, p 22) we mistakenly stated that humans can expect to recognise all but 0.05 per cent of spoken words. The figure should actually have been 0.5 per cent.
• The diagram of the eye in our article on evolution’s greatest inventions (9 April, p 28) erroneously included spiders and scorpions in the list of arthropods that have compound eyes. As reader Michael Grounds pointed out, they do in fact have simple eyes.
