A disagreement between observations of galaxy clusters and the cosmic background radiation could be explained by the existence of a fourth type of neutrino.
At SLAC National Accelerator Laboratory, researchers are using a particle accelerator to help them search for the source of ultra-high-energy cosmic rays.
Theoretical physicist David Kaplan discusses his new documentary “Particle Fever,” which followed scientists around the world for seven years as they hunted for the Higgs boson.
Bubbles popping in the hot particle soup that filled the early universe may have created a rumble like thunder that could help solve some mysteries of the Higgs boson and maybe lead to new physics.