Because of Lorentz contraction, as you approached the speed of light, the universe would be compressed to a single plane, with no distance in the direction that you are traveling, but the same as it was in the other directions.
OK, this is a long one.
Black holes are a singularity, right?
As is, their dimensions are 0mX0mX0m?
That is why their gravity is so strong, because objects can get much closer and thus make the distance between them 0 and force of gravity infinite.
In order for this to be possible, there...