Presents the culture of the Mayan empire, describing their social classes, pyramids, language, religion, calendar, writing, cities, agriculture, and art.
Describes how irrigation systems have worked throughout history, exploring the technology involved with such types as drip irrigation and subsurface irrigation.
Presents an introduction to the North American mountain goat, describing its physical characteristics, life cycle, habitat, diet, predators, and climbing abilities.
Describes everyday life for a variety of people living in ancient Rome, including senators, soldiers, priests, women, artisans, gladiators, and slaves.
