Brian R. Ward

Describes the physical characteristics, natural habitat, behavior, diet, and world distribution of tunas.

Discusses what an epidemic is, how it evolves, various causes and carriers, and efforts to prevent epidemics.

Describes the construction of the human eye and discusses problems with sight, infections, and injuries and how these may be corrected with eyeglasses or medicines.

Describes the various kinds of microbes found in a healthy garden, whether helpful or harmful.

Describes the various kinds of microbes found in our food, whether helpful or harmful.

Discusses the importance of good care and diet to maintain healthy teeth and gums, and modern advances in dentistry.