Describes the pyramids of Egypt and the Americas and their significance in the social, political, and religious life of long-vanished civilizations.

Archaeologist Daniel Knox is on the trail of the lost Dead Sea Scrolls.

Ancient Egypt has always fascinated people. Pyramids from that civilization still tower hundreds of feet into the air. Museums featuring mummies attract large crowds. Countless numbers of tourists flock to Egypt to view historical sites that date back thousands of years. These historical sites are in danger today. Some of the reasons are natural. For example, sandstorms rip across the desert, acting like sandpaper on the stone monuments. Others, such...