Ключевые слова: ancient, arbol de la vida, astronomy, aztec, belief, calculate, calendar, carve, celestial, characters, circle, culture, cycle, day, fear, god, hieroglyph, history, indian, man, maya, mayan, mexico, old, precise, priest, religion, ritual, science, scribe, script, season, solar, stars, stone, superstition, technology, tenochtitlan, time, tongue, tree of life, week, year, yucatan,