The Standard Model of Cosmology at Risk Due to Broken Symmetry
The electroweak horizon is a problem that has been known for a long time, but which simply has not gotten the kind of attention that the cosmic microwave background radiation attracted. The electroweak field is symmetric when the cosmic temperature is high, and as the separate electromagnetic and weak fields take form, that symmetry is broken. However, no one has found any cosmic strings or any other evidence for the different regions of electroweak symmetry breaking, which is why it is included in the list of cosmology's crises.