Gravitational waves



Physics (Ridge, N.Y., June 15) – The Laser Interferometer Gravitational-Wave Observatory has detected a second burst of gravitational waves from merging black holes. “This is a very important discovery,” says Stuart Shapiro, an astrophysicist at Illinois. “It cements the reality of the first detection and makes credible the belief that detections of this sort will be common and that we have truly opened up a new window to the universe.” Also: Observer (New York, June 20).