Unlock the secrets of the Maya calendar, which was unlike any other in the world - with nested cycles of time keyed to human, seasonal, and astronomical patterns. Look back to their year zero and the special importance of the number 1,195,640.

About 1,200 years ago in eastern North America, populations gathered their farms and living structures behind defensive walls. Explore Mississippian culture and see how it introduced an increased use of the bow and arrow along with a large body of art, extensive trade networks, and mythological creation stories remembered today in bits and pieces by a multitude of surviving indigenous nations.

Explore the many areas where native culture still survives in modern Mexico. Focus on the Zapotec, Huichol, and Nahua peoples (descendants of the Aztecs). Learn that traditions which have survived for thousands of years are now threatened by technologies such as the internet and cable television.

At the time of European contact, two main groups existed in the northeast - the hunter-gatherer Algonquian and the agrarian Iroquois. Delve into how the Iroquois created the first North American democracy as a solution to their increasing internal conflicts. Today, we know much of the U.S. Constitution is modeled on the Iroquois' "Great League of Peace" and its 117 articles of confederation.

Travel to the best known of all ancient Maya cities: Chichen Itza. Focus on its Toltec-Maya phase, from 1000 to 1200 AD, and the city's striking similarities to Tula. What do these connections imply about the history of Chichen Itza? Dr. Barnhart presents an intriguing theory.

Uncover what archaeology has revealed about the ancient peoples of the southwestern deserts. Survey the variety of strategies they used depending on their specific locale and how they developed into multiple distinct, but not isolated, cultures. See why today we recognize three core, and two peripheral, ancient cultures of the area.

About 3,500 years ago, while most North Americans were still nomadic, see how one group of ancient people developed a planned community on more than 900 acres to accommodate 4,000 to 5,000 inhabitants. Designed with exceptional engineering skills, the fascinating city of Poverty Point functioned for 1,000 years and included one of the oldest pyramids ever built on Earth.

Cortés's defeat of the Aztec empire was one of the greatest military victories in history. Analyze how the enterprising conquistador managed this coup with just a few hundred Spanish troops, aided by native allies and a secret weapon that even he did not know he had: infectious diseases.

Delve into Olmec art, searching for clues to who the Olmec were and what preoccupied these builders of Mesoamerica's first great civilization. Explore the mysteries of giant sculpted heads, jaguar carvings, and full-bearded figures depicting men who some think were foreigners from afar.

Review the events that brought an improbable expedition led by Christopher Columbus to the New World in search of Japan. Trace Columbus's later contact with Mesoamerica, and follow the arrival of Spanish conquistadors, including Vasco Núñez de Balboa and Hernán Cortés.