Snedden, Robert

Explains the physical differences that make reptiles distinct from any other class of animals.

Explores how organisms adapt to changing environments, from changes in physical appearance to adaptations in behavior, and examines the evolution of different plant and animal species.

Examines the development of space science and knowledge from ancient times through the present and into the future.

Looks at cells as life's building blocks, showing how cells are put together, examining the differences between prokaryotes and eukaryotes, speculating about the first forms of life, and discussing the newly-classified kingdom archaea.

Explores the development of cities over time, the impact that they have on the environment, and what can be done to lessen that impact.

Describes the climate, weather, flora, and fauna of the Arctic and Antarctic.

Explores the world's mountainous areas, weather, vegetation zones and tree lines, as well as a number of plants and animals that are found in these regions including mountain goats and bighorn sheep, mountain lions and bears, and species of predator birds.

Traces the history of astronomy, and recounts the careers and discoveries of the people whose work contributed to the development of knowledge about space.

Explores how the origins of life on earth have been traced while focusing on the scientists who have worked to crack the code that governs all living creatures.