  We present some arguments in favour of that the Kaluza-Klein picture of the
world has been confirmed in the experiments at very low energies where the
nucleon-nucleon dynamics has been studied. Early predicted ${\cal L}$-particle
is related to the new scale of strong nucleon-nucleon forces in the spirit of
Kaluza-Klein approach. It is shown that KK excitations remarkably describe the
experimentally observed mass spectrum of diproton system.
