LifeCould the super-rich be cloning themselves? And why would they? Nearly three decades since the remarkable cloning of Dolly the sheep, it has all gone quiet on the human cloning front. Michael Le Page wonders what's happening behind the scenes Comment
PhysicsThe fascinating story of the ultimate cosmic law How do we know the speed of light – and why does it have a speed limit at all? Leah Crane explores the history of one of the most important numbers in the universe Comment