Abandoned structures and machinery littered on an island a thousand miles away from Antarctica point to brief human occupations. Disturbing noises heard among foreign diplomats in Cuba, and many other countries, make researchers explore the possibility of a global psychological phenomenon. Mysterious rubber-like slabs emerge on European beaches linking a small Indonesian factory with the Second Industrial Revolution. A strange stone pattern found in the waters of Florida's Dry Tortugas National Park reveals a long-lost island.