  The holographic space-time approach to inflation provides a well defined and
self-contained framework to study the early universe. Based on a quasi-local
quantum gravity theory generalizing string theory beyond AdS backgrounds, it
addresses fundamental questions like the arrow of time and the entropy of the
initial cosmological state. It was recently argued that it also provides a
naturel explanation for dark matter in the form of primordial black holes. The
orignal idea however suffers from troubles that can be cured by considering
instead Planck relics. This possibility is investigated and paths for
observational confirmation are pointed out.
