Speedy Particles Put Einstein to the Test
An experiment purporting to show that subatomic particles can travel  faster than light has scientists' heads spinning. If confirmed, it would  undermine key pillars of modern physics.
 At a presentation in Switzerland,  scientists said Friday they had recorded ghostlike particles, known as  neutrinos, traveling a tiny bit faster than light—an apparent breach of  the cosmic speed limit set down by Albert Einstein more than a century  ago.
 The result could turn out to be an  embarrassing miscalculation by scientists—or portend a leap into a  science fiction territory where particles theoretically travel backward  in time. While a confirmation of the finding wouldn't mean anything has  changed about the universe, scientists' understanding of how it works  would be thrown into disarray.
"It would be the biggest physics discovery in a century because we'd  have to completely revise everything from subatomic physics to what we  know about how the universe evolved," said Neil Turok, director of the  Perimeter Institute for Theoretical Physics in Ontario, Canada.
 Like many physicists mulling the  development, Dr. Turok was skeptical. He said neutrinos reaching the  Earth from a supernova explosion have been observed to be traveling at  the speed of light, which doesn't agree with the latest finding. Other  scientists questioned the setup of the experiment and whether  statistical errors might have affected the conclusion.
 There also were questions about  whether the researchers properly accounted for small glitches that could  have had an unwanted effect—such as the rotation of the Earth, or the  location of the moon and its role in altering the shape of the Earth's  crust when the experiment was being conducted.
 Even the scientists who conducted the  neutrino experiment were wary about questioning one of Einstein's most  powerful legacies. They spent six months verifying and reverifying the  data, and called on physicists the world over to confirm—or refute—their  finding through independent experiments.....[
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