WE ALL know what happens if you fall into a black hole. It's not pretty - you get ripped limb from limb before vanishing down the plughole. However, there is a way for you to live inside a black hole: find one that has five dimensions. Life inside a 5D black hole is known to be rather more sustainable than it is in the 4D version. In the 4D case, you would experience "tidal" forces that vary so vastly over short distances that your body would be pulled apart. But in the 5D case, there is no physical plughole, and the tidal forces are negligible, so you could happily explore without fear of dismemberment. And, according to the results of my research, you may be doing that right now. A mathematical analysis says that our universe may well be a 5D black hole...