It is my understanding that with the passing of time, space actually expands in size. In about 14G years, space will be twice its current size. What will this do to black holes (BH)? If a BH is in intergalactic space and has nothing to consume, if space actually expands, the density of the BH should become 1/2. What happens to the event horizon in this case? Would this cause the BH to eventually disappear, similar to Hawking radiation?