The observations made by the LSND experiment in the 1990s suggested the presence of neutrino oscillation in a neutrino mass region (blue shaded areas) vastly different from other experiments (which are outside the region shown in this plot, at much smaller values of Δ m2). The MiniBooNE experiment rules out the region to the right of the black and blue lines, ruling out the simple two-neutrino oscillation interpretation of the LSND data.