The Gargamelle collaboration announced the first evidence for weak neutral currents. This groundbreaking discovery was the first experimental proof of the electroweak theory, according to which the weak force and the electromagnetic force are different versions of the same force and would have differentiated at the very beginning of the Universe. The theory predicted the existence of a specific manifestation, referred to as weak neutral currents, that required the existence of a neutral particle to carry the weak force. This Z particle was observed 10 years later by the UA1 and UA2 experiments at the SPS, along with the two other vector bosons of the weak force, the W+ and W- particles.