Modeling of propagation and origin of Galactic and Extra-Galactic cosmic rays, gamma-rays and neutrinos. In particular I am following and trying to provide consistent interpretations to the results of Fermi-LAT, PAMELA and AMS-02 multichannel experiments. This include the search for possible signatures of dark matter annihilation or decay.  I am also interested in cosmology in particular in the generation of primordial magnetic fields and stochastic backgrounds of gravitational waves.