Primordial Black Holes and Quantum Effects
  Primordial black holes (PBHs) are of special interest because of the crucial
role of quantum effects in their formation and evaporation. This means that
they provide a unique probe of the early universe, high-energy physics and
quantum gravity. We highlight some recent developments in the subject,
including improved limits on the fraction of the Universe going into
evaporating PBHs in the mass range $10^{9} - 10^{17}$ g and the possibility of
using PBHs to probe a cosmological bounce.
