In 1859, the brilliant scientist Urbain LeVerrier discovered that the planet Mercury has a wobble, that its orbit shifts over time. His explanation was that there had to be an unseen planet circling even closer to the sun. He called the planet Vulcan. Supported by the theories of Sir Isaac Newton, the finest astronomers of their generation began to seek out Vulcan and at least a dozen reports of discovery were filed. There was only one problem. Vulcan does not exist – and was never there.