Explains what mammals are and how they differ from other animals, with an overview of the life cycle of a variety of mammals, including pouched mammals, sea mammals, and flying mammals.
Explores the wild world of lizards, turtles, frogs, and other reptiles and amphibians, examining such things as where they live, what they eat, and how big they can get. Written in Spanish.
A brief analysis of the rise of the Industrial Age in Great Britain and America, discussing such topics as immigrant and slave labor, child labor laws, and labor unions.
