By Jason Palmer (Science and technology reporter, BBC News)
What might have been the biggest physics story of the past century may instead be down to a faulty connection. In September 2011, the Opera experiment reported it had seen particles called neutrinos evidently travelling faster than the speed of light.
The team has now found two problems that may have affected their test in opposing ways: one in its timing gear and one in an optical fibre connection. More tests from May will determine just how they affect measured speeds. more...