In particle physics, the electroweak interaction's the unified description of two of the four fundamental interactions of nature: electromagnetism and the weak interaction. Although these two forces appear very different at everyday low energies, the theory models them as two different aspects of the same force. Above the unification energy, on the order of 100 GeV, they'd merge into a single electroweak force. Thus if the universe's hot enough (approximately 1015 K, a temperature reached shortl… (More on Electroweak)