The Maya lived primarily in the Yucatán Peninsula – covering parts of Mexico (especially the states of Yucatán, Quintana Roo, Campeche, Chiapas, and Tabasco), as well as all of Guatemala and Belize, and parts of Honduras and El Salvador. Unlike the Aztecs in central Mexico (dry highlands) or the Inca in the Andes mountains, the Maya built their cities in tropical rainforests and lowlands. Famous Maya cities include Tikal (Guatemala), Palenque (Mexico), Copán (Honduras), and Chichén Itzá (Mexico).

The Maya invented the concept of zero! They used a shell symbol to represent zero in their vigesimal (base-20) number system. This allowed them to perform complex calculations. Only three civilizations in history independently invented zero: the Babylonians (base-60), the Indians (base-10), and the Maya (base-20). The Maya also developed the most advanced writing system in the Americas – over 800 glyphs representing syllables and whole words. Their calendar was so accurate that the solar year was calculated as 365.2420 days – remarkably close to the modern figure of 365.2422 days.

The Classic Maya collapse was likely caused by a combination of factors, not a single event. Archaeological evidence shows severe droughts around 800-900 CE, confirmed by lake sediment cores. The Maya had deforested vast areas for agriculture and construction, causing soil erosion. Overpopulation created food shortages, leading to warfare between city-states. The droughts would have been devastating for a civilization that relied on rainwater (few rivers in the Maya lowlands). The result was political collapse, but the Maya people survived.

Tenochtitlán is now Mexico City! The Spanish conquistador Hernán Cortés and his forces destroyed the Aztec capital in 1521 and built Mexico City on its ruins. Lake Texcoco was drained over centuries, and the modern city covers the ancient lakebed. Aztec ruins, including the Templo Mayor (Great Temple), have been excavated in the heart of Mexico City. The Aztec eagle-and-snake emblem appears today on the Mexican flag. Tenochtitlán had causeways connecting it to the mainland, aqueducts, canals, floating gardens (chinampas), and a massive central pyramid complex.

The nobles (pipiltin) were the highest class below the king! This class included military leaders, high priests, and government administrators. Membership was largely hereditary, though commoners could earn noble status through extraordinary military achievement. The Aztec emperor was chosen from the noble class. The commoners (macehualtin) made up most of the population – farmers, artisans, and merchants. Slaves were at the bottom, though they had certain legal rights and could buy their freedom.

Estimates range from several thousand to 20,000 human sacrifices annually. At the reconsecration of the Great Temple in Tenochtitlán (1487), Aztec sources claim 80,000 sacrifices over four days – a number most historians consider exaggerated (the population of Tenochtitlán was about 200,000). Regardless, human sacrifice was practiced on a scale unprecedented in world history. Victims were often captured warriors from neighboring states, meaning warfare and sacrifice were economically and religiously linked. This practice horrified the Spanish and was used to justify conquest.

Chinampas were artificial farming islands! The Aztecs built them in Lake Texcoco to grow maize, beans, squash, tomatoes, and flowers. The canals between chinampas allowed for easy transport by canoe and provided aquatic animals like fish and waterfowl. A single chinampa could feed dozens of people. This intensive agriculture supported Tenochtitlán's huge population. Modern farmers in Mexico City still use chinampas – some have been continuously farmed for over 500 years. They are a UNESCO World Heritage site.

European diseases were the deadliest weapon. Smallpox, measles, influenza – to which natives had no immunity – swept through the Aztec population. The smallpox epidemic of 1520 killed Emperor Cuitláhuac and tens of thousands of warriors and civilians. Depopulation and demoralization made resistance nearly impossible. Cortés also skillfully exploited Aztec tributary states who resented the empire. Despite superior steel weapons, horses, and gunpowder, the Spanish numbered only a few hundred – they could not have conquered without indigenous allies and disease.

The Maya never formed a single empire – they had competing city-states like Tikal, Calakmul, and Palenque that shared a common culture but fought each other. The Aztecs built a unified empire with Tenochtitlán as the capital. The Maya peaked around 250-900 CE (Classic period), while the Aztec Empire rose in the 1300s-1500s. The Maya built their cities in the tropical rainforests; the Aztecs in the central Mexican highlands. Both practiced human sacrifice, but the Aztecs did so on a much larger scale. Both played the Mesoamerican ballgame.

The Maya saw the end of a baktun cycle as a time of celebration and renewal, not destruction. References to the end of the 13th baktun in Maya inscriptions describe the return of a god, not doomsday. The 2012 phenomenon was a modern myth, not an ancient Maya prophecy. Maya communities today celebrated the 2012 date with festivals and ceremonies. This is a famous example of how ancient cultures are often misunderstood. The Maya calendars continue – the next baktun cycle began on December 22, 2012, and will continue for another 5,125 years.