This is the site of the Nordita scientific program "Astroparticle Physics - A Pathfinder to New Physics". We intend to keep the program rather loose what concerns seminars, thus giving more time for actual research and discussing future research projects among the participants of the program. In practice, we aim to have a couple of seminars each week during the running time of the program. In addition to the seminars, we intend to have a number of informal meetings to specifically discuss future progress in the various subtopics covered by the program and to have time to do actual work among the participants. The research topics to be covered at the program are: neutrino physics, dark matter, cosmology, supersymmetry, dark energy, inflation, extra dimensions, ultra-high energy cosmic rays, supernovae, leptogenesis.