Einstein’s waves detected in star smash

David Reitze of the California Institute of Technology and the executive director of the Laser Interferometer Gravitational-Wave Observatory, or LIGO, speaks at the National Press Club in Washington, Monday, Oct. 16, 2017, during an announcement on one of the most violent events in the cosmos that was witnessed completely for the first time in August and tells scientists where gold and other heavy elements come from. [Photo: AP/Susan Walsh]