In September 2011, the OPERA experiment at CERN announced that they had detected neutrinos traveling faster than the speed of light. This result caused a great deal of excitement and speculation, as it seemed to violate one of the most basic laws of physics. However, further investigation revealed that the results were due to a faulty wire, which had caused the timing of the neutrino measurements to be incorrect.

The OPERA experiment used a beam of neutrinos that was sent from CERN in Switzerland to the Gran Sasso National Laboratory in Italy. The neutrinos were detected by a series of detectors, and the time it took for them to travel between the two locations was measured. The results showed that the neutrinos appeared to be traveling faster than the speed of light.

However, further investigation revealed that there was a problem with the wiring of the detectors. This problem caused the timing of the neutrino measurements to be incorrect, which led to the false conclusion that the neutrinos were traveling faster than the speed of light.

The OPERA experiment has since corrected the problem with the wiring, and the results now show that the neutrinos are traveling at the speed of light, as expected.