Mysterious neutrino surplus hints at the existence of new particles

The MiniBooNE experiment found more interactions of the subatomic particles than expected

MiniBooNE

NEW NEUTRINO?  The particle detector MiniBooNE (shown) observed an excess of neutrino interactions, which may hint at the existence of a new type of neutrino.

Fermilab

Pip-squeak particles called neutrinos are dishing out more than scientists had bargained for.