Little evidence? We've got pictures of them a this point, friend. While we are not entirely sure on all of the specifics, and some things, such as the singulari

Little evidence? We've got pictures of them a this point, friend. While we are not entirely sure on all of the specifics, and some things, such as the singularity, are likely a bit different than our current theories suggest, there's mountains of evidence that support the existence of black holes, or at the very least, something that is very very very very very very very similar to them on the macro level.