Heart of the Matter

Neutrinos’ shifty behavior might help explain why the universe has so much stuff in it

By Charles Petit, 10:46 AM January 10, 2013

A golden age for the neutrino is dawning.

A few decades ago, these shy phantoms that flit nearly unfelt through the interstices of the universe seemed mere leftovers in the world of physics.

They outnumber all other particles of matter, whizzing away everywhere — many of them arising in droves from nuclear reactors and nucleosynthesis in stars. Their characteristics made them, to be sure, vitally important building blocks in the 1970s and ’80s for theorists who put together the standard mo...

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