Hi guys, Simple question for my first post. If nothing escapes Black Holes, how come they're such massive gravity pools? While I can accept that in certain cases the gravity may come from all the mass near the event horizon that did not yet got through (center of Galaxies where it constantly swallows stars), what about wandering Black Holes that don't have a ready supply of matter around them? Does this mean that the gravitons / gravity waves travel faster than c? Thanks!