One of the main dogmas of physics is that nothing can travel faster than the speed of light, but at the CERN collider, some subatomic particles seem to have exceeded this speed, breaking all known laws of physics. Neutrinos sent through the ground from CERN toward a laboratory hundreds of miles away seemed to show up a tiny fraction of a second early.
In BBC News, Jason Palmer quotes researcher Antonio Ereditato as saying, "We tried to find all possible explanations for this. We wanted to find a mistake–trivial mistakes, more complicated mistakes, or nasty effects–and we didn’t. When you don’t find anything, then you say ‘Well, now I’m forced to go out and ask the community to scrutinize this.’"