The National Institute of Standards and Technology's new cesium fountain clock is one of the most precise atomic clocks ever ...

A pivotal scene in the explosive hit biopic and Best Picture winner, "Oppenheimer," involves America's top scientists ...

Neutrinos and antineutrinos are elementary particles with small but unknown mass. High-precision atomic mass measurements have revealed that beta decay of the silver-110 isomer has a strong potential ...

The Hubble Space Telescope has been used to determine the mass of white dwarf star LAWD 37. It is "56 percent the mass of our ...