"Implications of observations for astrophysics and particle physics":
Recent measurements of cosmic ray positrons deviate considerably from the
theoretical expectations of a purely secondary flux originating in the
spallation of energetic particles on the interstellar medium. Therefore,
these measurements point to the existence of a primary source of high energy
positrons, which may be of astrophysical origin (such as pulsars) or the
result of the annihilation or the decay of dark matter particles. In this
talk I will review possible interpretations of these anomalies and I will
discuss the implications of the different interpretations for the antiproton
flux and the gamma ray flux.