“You cannot, in human experience, rush into the light. You have to go through the twilight into the broadening day before the noon comes and the full sun is upon the landscape.” –Woodrow Wilson
You might think of black holes as cosmic rarities, but the fact of the matter is that pretty much every time we form new stars in large numbers, we’re going to wind up forming black holes as well. This is something that, over the nearly 14 billion year history of the Universe, each and every galaxy has had literally thousands (if not millions) of opportunities to do.
Now, these black holes are typically only a few times the mass of our Sun, but over time, they can grow, merge and devour other matter to reach millions or even billions of solar masses! So where are the largest ones in the known Universe?
The answers are going to surprise you. Go read the whole thing and find out!