Traces the history of the Earth, how movements in its surface produce mountains, earthquakes, and volcanoes, and what causes the seasons, tides, and patterns of night and day.

These 36 half-hour lectures are your initiation into the geological world that lies just outside your door. "The Nature of Earth: An Introduction to Geology" introduces you to physical geology, the study of Earth's minerals, rocks, soils, and the processes that operate on them through time.

Traces the origins of a granite rock located near the Adirondack Mountains and describes how it reveals information about the history of the earth.