After a decade-long analysis, a collaboration of physicists has made the most precise measurement of the mass of a key particle – and it may unravel physics as we know it. The new measurement differs ...

The NIST Center for Neutron Research where the beam experiment was done. (Courtesy: Ronald Cappelletti/NIST) A re-evaluation of a 2005 measurement of the lifetime of the neutron has deepened the ...

A mysterious magnetic property of subatomic particles called muons hints that new fundamental particles may be lurking undiscovered. In a painstakingly precise experiment, muons’ gyrations within a ...

As far as astronomers can tell, the universe is continuing to expand — and our understanding of how it is doing this needs to expand as well. In fact, recent findings from researchers partnering with ...

The lithium problem poses challenges to BBN models, sparking research into cosmic processes and enhancing our grasp of nuclear and astrophysical phenomena.