• RNA-based viruses replicate in the host cell’s cytoplasm. The mimivirus, on which we reported, joins the poxviruses as the only DNA-based viruses to do so (10 April, p 10).
• The research we reported in our article on carnivorous plants and heavy metals was carried out by Iain Green and Christopher Moody (10 April, p 7).
• Steve Haake is a sports scientist at Sheffield Hallam University, UK (3 April, p 15).
