Add Yahoo as a preferred source to see more of our stories on Google. In the very early, very hot moments of the universe, the electromagnetic and weak nuclear forces were actually the same force—the ...

In the very early, very hot moments of the universe, the electromagnetic and weak nuclear forces were actually the same force—the electroweak interaction. Scientists can now study this interaction ...

Observational first: physicists have used the ATLAS experiment at CERN to observe the production of top-quark and photon pairs. (Courtesy: CERN) For the first time, particle physicists have observed ...