• In the 12 August issue we stated that crinoids, or sea lilies, appeared 300 million years ago and pre-dated fish (p 49). Both have actually been around for a lot longer than that, coexisting in the Ordovician period between 490 and 443 million years ago, with the first fish possibly coming earlier than crinoids. Also, the subclass of crinoids with the ability to move appeared 200 million years ago, not a mere 200,000 years ago.
• Hone Harawira is a member of the New Zealand parliament for the Maori Party, not a “Maori minister” as we described him (19 August, p 12).
