New research suggests neutrinos that appeared to break one of Einstein's fundamental theories by travelling faster than the speed of light actually keep within the universal speed limit after all.
The latest measurement of the subatomic particles' speed of flight from the CERN research center in Geneva to Gran Sasso in central Italy contradicts an initial super-fast reading reported last September, which caused a scientific sensation.
There have been doubts about the original claims since it was reported last month that the first finding may have been distorted by faulty cabling.
The new analysis was a separate experiment called ICARUS.
Using independent timing data and measuring seven neutrinos in the beam sent from CERN, they found the time was exactly consistent with the speed of light.
With Reuters reporting