• Attempts in the 1990s to create babies using DNA from three people led to two foetuses with genetic disorders (1 October, p 8).
• The Harvard neuroscientist studying children living in Romanian orphanages is Charles Nelson (1 October, p 5). Apologies.
• Getting warmer: it is the increase in global temperature above baseline that is expected to soar way past 2 °C (1 October, p 6).
