Introduces, in brief text and illustrations, the characteristics and functions of various types of machines used for excavation and moving material such as soil, rock, or dirt.
Describes various types of hamsters, their feeding, social, and reproductive habits, and life cycles, also includes suggestions for raising hamsters domestically
Examines how helicopters are used in modern warfare to carry troops and supplies, serve as reconnaissance and fighter craft, hunt and destroy submarines, and attack enemy ships.