Can we implement the holographic principle in asymptotically flat   spacetimes?
  We discuss some recent results in the quest to implement the holographic principle in asymptotically flat spacetimes. In particular we introduce the key ingredients of the candidate dual theory which lives at null infinity and it is invariant under the asymptotic symmetry group of this class of spacetimes. 
Claudio Dappiaggi (Pavia U.)