General relativity: Gravitational waves Even empty space-time, devoid of stars and galaxies, can have a life of its own Features
Einstein's Elusive Ripples: Years of scouring the Universe for Einstein's gravitational waves have proved fruitless. But now cosmologists think they may have found telltale signs in the microwave background radiationFeatures
Shudders in the fabric of space-time: Researchers around the world are racing to build a new type of telescope, that will detect gravitational waves from exploding stars, colliding pulsars and cosmic stringsFeatures