Mary B.1946 Woods

Explains what avalanches are and how they occur. Describes the destruction they can cause and the rescue efforts often used to find people in the snow. Provides a history of major avalanches that have occurred since prehistoric times.

Brief history of some major medical advances, from hand washing to prosthetics.

Examines ancient weapons and their uses in Mesopotamia, Egypt, China, India, Greece, Rome, and Mesoamerica.

Describes medical techniques such as brain surgery, splints, taking a pulse, forceps, and sanitation in ancient civilizations including the Stone Age, Egypt, Greece, China, India, and Rome.

Examines ancient methods of communication in the Middle East, India, China, Egypt, Greece, Rome, and Mesoamerica.

Discusses the methods of computation developed in various civilizations around the world, from prehistoric times up until the end of the Roman Empire.