USA: Gravitational waves from black holes discovered

In an announcement that electrified the world of astronomy, scientists said Thursday that they have finally detected gravitational waves, the ripples in the fabric of space-time that Albert Einstein predicted a century ago. Some scientists likened the breakthrough to the moment Galileo took up a telescope to look at the planets. The discovery of these waves, created by violent collisions in the universe, excites astronomers because it opens the door to a new way of observing the cosmos. For them, it’s like turning a silent movie into a talkie because these waves are the soundtrack of the cosmos. - See more