PhysicsJupiter's moon Ganymede could be a giant dark matter detector Large pieces of dark matter hitting Jupiter’s largest moon would form distinctive craters in its icy surface, and upcoming space missions might be able to spot them News
PhysicsWhere does time actually come from? The arrow of time can teach us more about how the universe began – and how it will end, says quantum columnist Karmela Padavic-Callaghan Comment