Every year, more than a million people report seeing UFOs. Are these people crackpots and attention-seekers? Or is there something real behind their claims? Hugh Ross, a Christian physicist and astronomer, has studied UFO phenomena for years. His conclusion: The overwhelming majority are explainable, but some are not, and they could be dangerous. In his book, LIGHTS IN THE SKY AND LITTLE GREEN MEN, Ross writes that, after all the frauds and natural causes have been exposed, researchers "agree that there must be something real at the bottom of some UFO reports." For one thing, there's physical evidence. In the...