Sign of a long-sought asymmetry

A result from the LHCb experiment shows what could be the first evidence of matter and antimatter baryons behaving differently. A new result from the LHCb experiment at CERN could help explain why our universe is made of matter and not antimatter. Matter particles, such as protons and electrons, all have an antimatter twin. These antimatter twins appear identical in nearly every respect except that their electric and magnetic properties are opposite. Cosmologists predict that the Big Bang produc...