• Joseph Bramante, who suggested that dark matter could supply mass for supernova explosions, is at Notre Dame University in Indiana (31 October, p 14).
• There’s more to life than that: we meant to say that graphite flecks in 4.1-billion-year-old zircon crystals had a ratio of carbon-12 to carbon-13 isotopes that is characteristic of organic origins (24 October, p 12).
• Vincent van Gogh said in letters that he used chrome yellow pigment in all seven of his Sunflowers series of paintings (31 October, p 17).
