Discusses the accounts of Greek historian Herodotus and the exploration of the world in which he lived.

Explains how physics is involved in all aspects of our lives--through chapters on physics in fun, nature, home, and sports--andpresents activities to demonstrate physical principles.

Discusses the proposed manned space flight to Mars and what might be found there.

Examines the life and times of the German scientist and geographer who helped found modern geography and pioneered in plant geography and climatology.

Examines the political forces and personal ambition that drove Marco Polo in his explorations.

Describes the kangaroo, platypus, and other animals native to Australia and discusses their origin and adaptation to their environment.

Discusses the many problems that animals around the world face and what people are doing to help. A wall poster and a 24-page booklet of games and puzzles are included.

A biography of the English seaman and explorer who was knighted by Queen Elizabeth I for helping to make England a world power by circumnavigating the globe and raiding Spanish ships.

Describes how inventors think and work, explains how one invention--plastic--has changed the world, and briefly discusses seventy-five other important inventions, from the jet engine to the potato chip.

Discusses the structures built by many different kinds of animals for protection, food gathering, storage, and nesting.