Silverstein, Alvin

Explains different types of forces, how forces and simple machines work, the laws of motion, and how the laws act in different substances.

Describes the anatomy of the hand and discusses the many things hands can do, how left- or right-handedness is developed, and how gestures are used in communication.

Explains the various types of allergies, their symptoms, causes, and treatment, and discusses research being conducted to find cures for allergic diseases.

Describes the structure of the brain, spinal cord, and nerve cells and their function in sending out, receiving and interpreting messages from all parts of the body.

Explores the mating habits and reproductive process of several members of the plant and animal kingdoms.

Describes how advances in genetics are being used in screening and counseling and discusses the medical and ethical aspects of genetic engineering.

Discusses the many different functions of the mouth and describes the physical characteristics and duties of the individual structures it contains.

Describes the physical characteristics of earaches, explains what causes them and how to treat them as well as tips on preventing an earache.

Discusses the symptoms of diabetes, its history, causes, diagnosis, treatment, and implications for the future of current research.