Higgs Cosmology and Dark Matter
  Higgs vacuum stability has important consequences for cosmology. In
particular, we argue that if the Higgs vacuum is metastable, then the dark
matter cannot contain a single black hole of mass less than $10^{15}{\rm g}$ in
our entire past light cone. In addition to being the destroyer microscopic
black holes, it may be possible that Higgs vacuum decay is a source of
primordial black holes during inflation.
