Explains how our animal classification system works and looks at how scientists use it to identify and group animal species, explores the variation between and within animal species and discusses how and why such variations have occurred.

"Within the rock cycle, there are so many other processes! Weather, erosion, and the creation of metamorphic, igneous, and sedimentary rock are all part of the greater process scientists call the rock cycle. In this colorful and engaging volume, readers read about each process in accessible language and then review it in an easy-to-follow flowchart. Full of Earth science content that supports classroom learning, the main content guides readers through...

Discusses the social behavior of chimpanzees.

Look inside a tree and discover a world of inhabitants! A close look at this microhabitat reveals an unbelievable variety of organisms. Vibrant photographs and detailed illustrations combine to make these books informative and engaging. A visual table of contents helps readers navigate the text, and informative labels make the photographs valuable sources of information. -- Amazon.com.

Take a trip into space and discover the spacecraft, satellites, and telescopes that travel among the galaxies and stars. Learn about the astronauts who have lived in orbit and set foot on the moon and find out about the future of space tourism and exploration.

Traces the history of television's invention from its beginning to the present day.