... Behemoth black hole found in an unlikely place . Gravitational wave search provides insights into galaxy evolution and mergers . ... Cosmic Adventures . ... Cosmic collisions no longer suspected of promoting black hole growth . ... For years, these cosmic collisions have been blamed for triggering violent outbursts at the hearts of galaxies. ... Until now, the leading theory has been that mergers between galaxies are instrumental in driving matter into the black holes, making them grow. ...