Is the climate activist group’s campaign proving a success? Plus, Bahamian-born, US-based Strachan on his new Hayward show and a close look at a hanging bronze by Bourgeois

As a new show opens at Marian Goodman Gallery in London, the Bahamian artist explains why he feels schoolchildren, and not the art world, are his natural audience

Fulfilling artists’ quests, a diamond-shaped balloon and a gold bust are expected to orbit the Earth