  As was suggested about a year ago, one of the most dramatic consequences of
low-scale (~1 TeV) quantum gravity is copious production of mini black holes at
future accelerators and in ultra-high-energy cosmic ray collisions. Hawking
radiation of these black holes is constrained mainly to our (3+1)-dimensional
world and results in rich phenomenology. With the original idea having been
cited over a hundred times since its appearence, we review the current status
of astrophysical observations of black holes and selected topics in the mini
black hole phenomenology, such as production rates at colliders and in cosmic
rays, Hawking radiation as a sensitive probe of the dimensionality of extra
space, as well as an exciting possibility of finding new physics in the decays
of black holes.
