• No slight was intended to anyone when in a review of the Scientists Meet the Media event, Fiona Fox was wrongly described as a journalist for The Times (9 March, p 20). She is, of course, the chief executive of the Science Media Centre.
• An extra zero sneaked into a figure in our Instant Expert on photosynthesis (2 February). We should have said that oxygen levels had begun to stabilise at around today’s level 40 million years ago.
• In our look at plans for a crewed Mars fly-by, Graham Scott of the Center for Space Medicine at Baylor College of Medicine should have been described as a biomedical researcher, not a geneticist (9 March, p 6).
