  If a single sterile neutrino exists such that $m_{\nu_s}\sim11eV$, it can
serendipitously solve all outstanding issues of the Modified Newtonian
Dynamics. With it one can explain the dark matter of galaxy clusters without
influencing individual galaxies, match the angular power spectrum of the cosmic
microwave background and potentially fit the matter power spectrum. This model
is flat with $\Omega_{\nu_s}\sim0.23$ and the usual baryonic and dark energy
components, thus the Universe has the same expansion history as the $\lcdm$
model and only differs at the galactic scale where the Modified Dynamics
outperforms $\lcdm$ significantly.
