A comprehensive, illustrated guide showing how more than 300 machines, mechanisms, and processes that affect our everyday lives work.

Presents an overview of many of the medical methods and treatments used to prevent diseases, relieve pain, and treat illnesses as they have developed particularly in the twentieth century.

A look at our respiratory system.

A guide to the way plants and animals function and struggle to survive on Earth.

Presents information on how and where to find fossils, the preparation and tools needed for collecting them, and how to identify the various kinds: plant, invertebrate, and vertebrate.