(REUTERS) — Neutrinos which appeared to have undermined a basic law of the universe by exceeding the speed of light might have done so even faster than first thought – or might not have done it at all, physicists in Italy said on Thursday.

The scientists at the Gran Sasso laboratory said tests on the equipment used in their experiment had led to two question marks over its sensational results, because of problems with possibly faulty cabling and separately with a timing mechanism.

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