They are more common than believed. They look to be at the center of every galaxy. Another weird thing is there are stars that circle a black hole and do so for thousands of years. As long as their circulation doesn't deteriorate, they can stay on the outside of the "event horizon" and not be sucked in.
that all things sucked into it apparently time travel, because the extreme gravity distorts time itself. new particle theory possible, as well as the possibility of discovering a new ultra short wave light spectrum on backside
That as it spins rapidly, it drags space/time along with it. Even the earth is said to drag space/time by about 6 feet per year, but near the event horizon of a black hole, space/time can be dragged almost in lockstep with the spinning of the black hole itself. This allows for matter to be swallowed by the event horizon without being frozen it time, because the materials are being carried along with space/time, instead of traveling through space/time. Space/time is not fully collapsed at the event horizon of a black hole. This is a radically new concept.