The adventure spans the world from Stonehenge to astronomically aligned pyramids at Giza, from Mayan observatories at Chichen Itza to the atomic clock in Washington, the world's official timekeeper since the 1960s. We visit cultures from Vedic India and Cleopatra's Egypt to Byzantium and the Elizabethan court; and meet an impressive cast of historic personages from Julius Caesar to Omar Khayyam, and giants of science from Galileo and Copernicus to Stephen Hawking. Our present calendar system predates the invention of the telescope, the mechanical clock, and the concept ol zero and its...

This is the story of a legendary expedition across four thousand miles of the future United States, led by an explorer searching for an illusionary empire of gold. Formerly the second-in-command in Francisco Pizarro's conquest of the Incas in 1531, Hernando de Soto arrived in the country he called La Florida in 1539, leading a glittering, armored Renaissance-era army of six hundred men on the first major exploration of North America. Obsessed with finding a second Inca empire, he instead encountered the Mississippians, a sophisticated culture of mound and city builders, warriors, artisans,...