Abstract: Precision measurement of the magnetic moment of the muon yields a result 4.2 sigma above the prediction of the Standard Model. At the same time, the lattice QCD calculation of the “hadronic vacuum polarization” — essentially, a weighted integral of the cross section for e+e- -> hadrons — disagrees with the direct experimental measurement at a similar level. I will propose that both discrepancies can be explained, quite naturally, by production of unseen final states in e+e- -> hadrons. Such so-far-undiscovered hadrons have to be neutral and long-lived to have escaped detection, and in fact could be the Dark Matter particle. I will discuss tests of this proposal.