Interesting stuff often occurs on the boundaries of things
Like the neutron star/black hole boundary.
I think it's less a case of a new class of black hole as just one that's smaller (quite a lot smaller) than anyone they've seen before.
Now the question is how common are these? Quite rare (so there aren't a lot of them to see) or quite common but not noticed as they keep themselves to themselves and don't drain any nearby stars material?
It's always good when new observations show new things. I'm not sure we should scrap existing theory just yet though.
Biting the hand that feeds IT
