Who said nothing is faster than light

The OPERA team found that their neutrinos travelled , kilometers per second, which is just above the established speed of light, which is usually measured at , kilometers per second. Einstein's special theory of relativity says nothing can travel faster than light.

One issue that many skeptics centered on was the relatively long length of the proton pulses that create the neutrinos that the Italian detector receives. In new experiments run last month, CERN reduced the time of the proton pulses from In the new experiment, the neutrinos still traveled faster than the speed of light.

But even with this new confirmation, the physicists themselves are not quite ready to fully accept these results. According to Nature, a highly-respected scientific journal, many OPERA team members who initially declined to sign their names to the paper have now come on board. That includes Caren Hagner, a professor of physics at the University of Hamburg, who had been one of the most skeptical members of the group.

After the new experiment improved precision and augmented the statistical analysis, Hagner told Nature that she has "much more confidence" in the new results. But many cautious scientists often cite Carl Sagan, a giant among 20th century astrophysicists, who once said: "Extraordinary claims require extraordinary evidence.

The average person "could, in principle, travel to the past and kill their mother before they were born," says De Rujula. For his part, Ereditato is avoiding dwelling on what the demotion of light could mean. Skip to header Skip to main content Skip to footer Instant Guide. Here's what you should know: What are neutrinos? Vaccination Nation. Astronauts splash down in SpaceX capsule after days in space.

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In fact, the phrase "faster than light" is physically meaningless. It's like saying "darker than black. You might say that maybe Einstein's theories of relativity are wrong. However, there is so much evidence now supporting relativity that, if it is wrong, it will have to be wrong in a small way that does not change these basic principles.