Escape From a Black Hole

The black hole: the inner boundary of the known universe, the point of no return. This is the region in the vicinity of a gravitational singularity which, once entered, cannot be left.Or can it?Black holes are mysterious, almost arcane objects, but this particular property--their inescapability--arises naturally as a consequence of Einstein's theory of general relativity. Every massive body has an escape velocity, the "launch speed" you'd need to get free of its gravitational pull and avoid fall...