Speed
In September 2011, OPERA researchers observed muon neutrinos traveling apparently at faster than lightspeed (see: Faster-than-light neutrino anomaly). This result was confirmed again in a second November experiment. These results have been viewed sceptically by the scientific community at large, and more experiments have/are investigating the phenomenon. In March 2012, the ICARUS team published results directly contradicting the results of OPERA.
Read more about this topic: Muon Neutrino