Seven 9s and 10s

I wonder if 600 years from now, humans will look back in disbelief at our scientific theories about the universe, just as we look back now and laugh at the idea that the world was flat.

Seriously.

What if there are no such things as black holes?  What if all the evidence we think points to black holes is actually pointing to something else - something so mind-boggling and immense that we can’t even begin to imagine what it may be, because we’re focusing on minuscule individual pieces of an indescribably massive other thing?