  If the published event rates of the chlorine and Kamiokande solar neutrino
experiments are correct, then the energy spectrum of neutrinos produced by the
decay of $^8$B in the sun must be different from the energy spectrum determined
from laboratory nuclear physics measurements. This change in the energy
spectrum requires physics beyond the standard electroweak model. In addition,
the GALLEX and SAGE experiments, which currently have large statistical
uncertainties, differ from the predictions of the standard solar model by $2
\sigma$ and $3 \sigma$, respectively.
