Explains how fossils are formed and what they tell us about the past.

Describes the water cycle, discusses water pollution, and examines what is being done to protect our essential water supply.

Briefly describes how a cow produces milk, how the milk is processed in a dairy, and how various other dairy products are made from milk.

Discusses the physical characteristics and habits of those rodents of the far north whose periodic massive marches to the sea continue to baffle scientists looking for a reason.

Simple text and pictures describe the woolly mammoth, a giant land mammal that has been extinct for over 11,000 years.

Introduces the solar system and its nine planets. Includes directions for making two models: one showing relative sizes of the planets and the other, their relative distances from the sun.

Introduces the muscles of the human body and describes how they enable the parts of the body to move.

An introduction to reflex acts that explains why we cough, sneeze, shiver, hiccup, yawn, and blink.

Discusses some of the ideas and misconceptions about life in outer space and speculates on the existence of such life in light of recent space explorations.