It’s mass for the masses. A tabletop device makes the new definition of the kilogram more accessible. Previously, the kilogram had been equal to the mass of a special metal cylinder kept in a vault ...

A new estimate of the ghostly particle’s maximum possible mass brings physicists a tad closer to understanding the universe. By Katrina Miller Katrina Miller studied neutrinos in graduate school, but ...

While most of us have a limited understanding of physics, we have an idea of what “critical mass” means. But just in case: when you reach a sufficient and/or necessary level of something to effect ...

Precise measurement of a neutron star's mass yields a surprisingly large figure that rules out several models for the star's composition and also strongly affects other fields of physics. Astronomers ...

NOBEL SCIENCE prizes are awarded in three areas: physics, chemistry and physiology or medicine. But occasionally some noteworthy discovery comes along that does not really fit into any of them. In ...