Venue: GO Jones Room 410
In this talk I will review the set of astrophysical and cosmological observations, usually attributed to the dark sector, from the perspective of modified gravity. I will highlight the achievements of MG theories and the drawbacks for a complete theory. The main motivation of this work are recent analyses of the dynamics of wide binary star systems and clusters of stars. Both seem to favour a modified gravitational dynamics and challenge the dark matter picture instead. A phenomenological MG theory fitting these observations is finally put forward.