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dracodraconisTechnology Review: Blogs: arXiv blog: If superconducting sheets reflected gravitational waves...
University of California researchers claim that superconducting sheets can reflect gravitational waves, which might provide an alternative explanation for the anomalous Gravity Probe B measurements. The only other explanation, other than mechanical error, has been that the probe is detecting the fundamental graininess of time; although, technically, the graininess explanation has only been applied to measurement noise from the Geo600 which is being constructed for use with the Gravity Probe B.