New Scientist: In oceans around the world, heat-resistant algae are offering the prospect of a colourful future for corals. The reef-forming animals are upgrading their symbiotic algae so that they can survive the bleaching that occurs in waters warming under climate change. “The most exciting thing was discovering live, healthy corals on reefs already as hot as the ocean is likely to get 100 years from now,” says Stephen Palumbi of Stanford University. Corals have a symbiotic relationship …