• We have got wind of an error in our story about polar influences on the jet stream (4 October, p 16): the Arctic melt peaks in September.
• Status update: after recovering from his illness, Faustino the chimp rose back to beta male in his troop (11 October, p 28).
• We came unstuck in our article on harvestmen’s glue-laced legs (11 October, p 19); the arachnids are in Opiliones, a different order to spiders.
