  We propose that the cosmological gamma ray bursts arise from the collapse of
neutron stars to black holes triggered by collisions or mergers with main
sequence stars. This scenario represents a cosmological history qualitatively
different from most previous theories because it contains a significant
contribution from an old stellar population, namely the globular clusters.
  Furthermore, the gas poor central regions of globular clusters provide an
ideal environment for the generation of the recently confirmed afterglows via
the fireball scenario. Collisions resulting from neutron star birth kicks in
close binaries may also contribute to the overall rate and should lead to
associations between some gamma ray bursts and supernovae of type Ib/c.
