Supermassive black holes (SMBHs) are the churning engines of galaxies, but astrophysicists aren’t exactly sure how two of them merge. While evidence suggests this occurs, we’ve never seen a merger ...

The original version of this story appeared in Quanta Magazine. Galaxies have been merging into ever-bigger structures over the course of cosmic history. When galaxies merge, the supermassive black ...

The solution to astronomy's "final parsec problem" could come from the dark universe and it could change everything we know about dark matter. When you purchase through links on our site, we may earn ...