The mystery of neutrino mass is now smaller than ever

The mystery of neutrino mass is now smaller than ever

There are many puzzles out there about the very nature of reality that remain to be solved. Many of the big ones include dark matter, dark energy, the ultimate origin of space and time, and why our Universe is made of normal matter and not an equal amount of antimatter. But even though they’re largely derided as “cosmically unimportant,” the humble neutrino presents a tremendous cosmic mystery as well. First proposed way back in 1930 as a possib…