Add Yahoo as a preferred source to see more of our stories on Google. Einstein proposed his special theory of relativity 120 years ago, and despite numerous attempts to challenge it, the theory still ...

University of Chicago scientists have solved a 20-year-old puzzle in particle physics using data from an experiment conducted for an entirely different purpose. Physicists had long known that ...

Thanks to a new development in nuclear physics theory, scientists exploring expanding fireballs that mimic the early universe have new signs to look for as they map out the transition from primordial ...

John Iliopoulos of the Ecole Normale Supérieure in Paris and Luciano Maiani of the Università degli Studi di Roma have been awarded the 2007 Dirac medal. Iliopoulos and Maiani each win $5,000 “for ...

Physicists have announced the discovery of a new type of pentaquark 1. Most ordinary matter is made up of three-quark particles —protons and neutrons. The five-particle pentaquarks and their ...