Why are neutrino masses so tiny?

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Neutrinos on a seesaw

A possible explanation for the lightness of neutrinos could help answer some big questions about the universe.

For Symmetry Magazine:

Mass is a fundamental property of matter, but there’s still a lot about it we don’t understand—especially when it comes to the strangely tiny masses of neutrinos.

An idea called the seesaw mechanism proposes a way to explain the masses of these curious particles. If shown to be correct, it could help us understand a great deal about the nature of fundamental forces and—maybe—why there’s more matter than antimatter in the universe today. [Read the rest at Symmetry Magazine….]