Neutrino and/or etherino?

We review the insufficiencies of the hypothesis that neutrinos and quarks are physical particles in our spacetime; we introduce the hypothesis that the energy and spin needed for the synthesis of the neutron inside stars originate either from the environment or from the ether conceived as a universal medium with very high energy density via an entity here called {\it etherino,} denoted with the letter "$a$" (from the Latin aether), carrying mass and charge 0, spin 1/2 and $0.78 MeV$ energy according to the synthesis $p^+ + a + e^-\to n$; we identifies compatibility and incompatibility of the neutrino and etherino hypotheses; we review the new structure model of the neutron and hadrons at large with massive physical constituents produced free in the spontaneous decays as permitted by the covering hadronic mechanics; and we conclude with the proposal of new resolutory experiments.