Gray, Leon

Describes the physical characteristics, behavior, and habitats of the trumpeter swan.

Examines the causes and disastrous effects of tsunamis, and discusses early warning systems and how scientists study and predict tsunamis.

Questions the moral and ethical aspects of genetic modification and examines the pros and cons of each argument.

Introduces the chemical element of zinc, explaining what it is, describing its characteristics, and discussing its history, where it is found, how it is processed, how it reacts, galvanizing, alloys, and the role of zinc in technology, crops, and the human body.

Describes the properties of the element iodine and covers its discovery, its uses, its production, and its role in people's health. Also discusses chemical reactions.

Examines the characteristics, sources, and uses of the element tin, as well as tin's importance in our lives.