Kenneth C. Davis has made a great living with his “Don’t Know Much About” books. It began with Don’t Know Much About History. It became a mega-bestseller. He went on to write books on the presidents, the Bible, geography, the Civil War, the solar system, mythology, and other subjects. Davis

News of an asteroid worth 10,000 quadrillions in precious heavy metals has scientists, gold bugs, and journalists all atwitter. “That means if we carried it back to Earth, it would destroy commodity prices and cause the world’s economy – worth $75.5 trillion – to collapse.” How is this possible? I