Astronomers just found a black hole so huge it makes our galaxy's black hole look like a baby

At the heart of our home galaxy is a supermassive black hole that gobbles up anything that gets too close. It's huge, with a mass of 4 million times that of our Sun, but size is a relative thing when we're talking about the universe, and astronomers just spotted a black hole in a distant galaxy that puts ours to shame. The galaxy, Holm 15A, sits around 700 million light-years away, making it somewhat difficult to study in detail, but what scientists know for sure is that the black hole in its he...