  In this essay we argue that once quantum gravitational effects change the
classical geometry of a black hole and remove the curvature singularity, the
black hole would not evaporate entirely but approach a remnant. In a modified
Schwarzschild spacetime characterized by a finite Kretschmann scalar, a minimal
mass of the black hole is naturally bounded by the existence of the horizon
rather than introduced by hand. A thermodynamical analysis discloses that the
temperature, heat capacity and the luminosity are vanishing naturally when the
black hole mass approaches the minimal value. This phenomenon may be attributed
to the existence of the minimal length in quantum gravity. It can also be
understood heuristically by connecting the generalized uncertainty principle
with the running of Newton's gravitational constant.
