What the discovery of gravitational waves means, Allan Adams

More than a billion years ago, two black holes in a distant galaxy locked into a spiral, falling inexorably toward each other, and collided. All that energy was pumped into the fabric of time and space itself, says theoretical physicist Allan Adams, making the universe explode in roiling waves of About 25 years ago, a group of scientists built a giant laser detector called LIGO to search for these kinds of waves, which had been predicted but never observed. In this mindbending talk, Adams brea