Your world explained series

An introduction to the world of dinosaurs, discussing their physical characteristics and behavior and the various types of prehistoric animals that once roamed the earth, from iguanadonts and stegosaurs to early turtles and crocodiles.

A detailed exploration of the Earth, using illustrations, examples, and simplified language to discuss Earth's place in the solar system; land forms; the forces inside and outside the planet that control such things as volcanoes, earthquakes, winds, and storms; and the effects humans have on the environment.

An introduction to astronomy, with data on stars, galaxies, planets, comets, and the Milky Way. Includes star maps for locating constellations, galaxies, and other objects in space.