Astrochemistry: overview and challenges
  This paper provides a brief overview of the journey of molecules through the
Cosmos, from local diffuse interstellar clouds and PDRs to distant galaxies,
and from cold dark clouds to hot star-forming cores, protoplanetary disks,
planetesimals and exoplanets. Recent developments in each area are sketched and
the importance of connecting astronomy with chemistry and other disciplines is
emphasized. Fourteen challenges for the field of Astrochemistry in the coming
decades are formulated.
