The physicists say that neutrinos sent 730 kilometers (453.6 miles) underground between laboratories in Switzerland and Italy arrived a fraction of a second sooner than they should have, according to the speed of light.
The report was published Friday by a group of researchers working on the so-called Opera experiment, based at the European Organization for Nuclear Research (CERN) in Switzerland.
"This result comes as a complete surprise," report author Antonio Ereditato at the University of Bern, in Switzerland, said in a statement.
"After many months of studies and cross checks, we have not found any instrumental effect that could explain the result of the measurement."




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