A new experiment appears to provide further evidence that Einstein may have been wrong when he said nothing could go faster than the speed of light, a theory that underpins modern thinking on how the universe works.
The new evidence, challenging a dogma of science that has held since Albert Einstein laid out his theory of relativity in 1905, appeared to confirm a startling finding that sub-atomic particles called neutrinos could travel fractions of a second faster.
The new experiment at the Gran Sasso laboratory, using a neutrino beam from CERN in Switzerland, 720 km (450 miles) away, was held to check findings in September by a team of scientists which were greeted with some skepticism.
Scientists at the Italian Institute for Nuclear Physics (INFN) said in a statement on Friday that their new tests aimed to exclude one potential systematic effect that may have affected the original measurement.
"A measurement so delicate and carrying a profound implication on physics requires an extraordinary level of scrutiny," said Fernando Ferroni, president of the INFN.