An article published on the arXiv server describes the observation of an excess of electron neutrinos detected by FermiLab’s MiniBooNE experiment. The results are consistent with regard to energy and order of magnitude with those obtained in the 1990s by the LSND experiment in Los Alamos. The most likely explanation is that it’s a proof of the existence of the sterile neutrino, a type of neutrino hypothesized but at least so far not found despite a lot of targeted research.