When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A big, electron-counting machine has indirectly turned up a measurement of the slipperiest known ...

For decades scientists have tried to find a way to measure the mass of the lightest matter particle known to exist. Three new approaches now have a chance to succeed. In 1980, Hamish Robertson was a ...

Researchers from the KATRIN (Karlsruhe Tritium Neutrino) experiment report the most precise measurement of the upper mass limit of the neutrino to date, establishing it as 0.45 electron volts (eV) – ...