We review
the properties of strange exotic states including dibaryons and pentaquarks,
their decays and possible detection in relativistic heavy-ion collisions.
In addition, constraints from pulsar mass measurements on the in-medium
behaviour of dibaryons and pentaquarks are presented. Signals for
the presence of a quark matter core are discussed, in particular
the recent attempts to explain the observed large kick velocities
of pulsars.