New cosmological constraints on primordial black holes
  We update the constraints on the fraction of the Universe going into
primordial black holes in the mass range 10^9--10^17 g associated with the
effects of their evaporations on big bang nucleosynthesis and the extragalactic
photon background. We include for the first time all the effects of quark and
gluon emission by black holes on these constraints and account for the latest
observational developments. We then discuss the other constraints in this mass
range and show that these are weaker than the nucleosynthesis and photon
background limits, apart from a small range 10^13--10^14 g, where the damping
of cosmic microwave background anisotropies dominates. Finally we review the
gravitational and astrophysical effects of nonevaporating primordial black
holes, updating constraints over the broader mass range 1--10^50 g.
