Examines the variation in life-spans of both domestic and wild animals, ranging from one day to more than a century. Discusses ways of estimating age and theories on why life-spans vary and what causes aging.
Describes the life of the silversmith who made the historic ride to announce the coming of British troops to Massachusetts at the beginning of the Revolutionary War.
Moira, a seventh-grader in a predominantly Irish Catholic school, struggles with her conscience because of her desire to see a movie classed "B" by the Legion of Decency.
Examines the variation in life-spans of both domestic and wild animals, ranging from one day to more than a century. Discusses ways of estimating age and theories on why life-spans vary and what causes aging.
Discusses the ability of many different animals including crabs, vultures, otters, elephants, and chimpanzees to use tools and the ability of a fewer number of species to make tools.