Supermassive black holes may be lurking everywhere in the universe

One of the largest supermassive black holes on record has been discovered in an unexpected place: a relatively sparse region of the local universe where massive galaxies — the typical home of these huge black holes — are few and far between. According new research, there could be many more such black holes — quiescent quasars — hiding in the universe’s deserts. This one may be or once was a binary black hole.