Prospects in Astroparticle Physics

The close links between particle physics - the study of the very small - and cosmology - the study of the very large - are reviewed. Many of the most fundamental problems in the macrophysical history of the Universe can only be solved with knowledge of the fundamental laws of microphysics. Conversely, some speculations about particle physics may be testable only in astrophysics. The density budget of the Universe, particle candidates for dark matter and the search for supersymmetry with both astrophysical and accelerator experiments are discussed in more detail.