Why did the great airship Hindenburg explode? Why did Greenland's Vikings disappear? What happened to the peaceful ancient Pueblo civilization of the American southwest? Did a cataclysmic event plunge humankind into the period known as the early Dark Ages? Today, scientists from a wide range of disciplines, armed with advanced technology and a determination to know the truth, are penetrating myths and legends to arrive at important conclusions about the causes and consequences of these dark mysteries. These hi-tech investigators and their discoveries are the subject of this four-part series. Titles included in this set: Catastrophe, The Lost Viking, What Happened to the Hindenberg and Cannibalism in the Canyon.