Clocks That Lie on Purpose: How Engineered Timekeeping Errors Reveal the Truth About Relativity

Every satellite in the Global Positioning System is carrying a lie. Not a malfunction. Not a defect. A precisely calculated falsehood, programmed into its atomic clock before the rocket ever leaves the ground, because the alternative, a clock that tells the truth on the launchpad, would become wildly, dangerously wrong the moment it reached orbit.This is the strange, true story of how that lie was...