LifeOrcas scrub each other clean with bits of kelp Drone footage has captured killer whales breaking off stalks of kelp and rubbing the pieces on other orcas, a rare case of tool use in marine animals News
EnvironmentCould undersea living be the future as sea levels rise? In this latest instalment of Future Chronicles, an imagined history of future inventions, we journey to 2035, when undersea living became a reality. Rowan Hooper tells us how it happened Comment