Explains how people create too much waste and how waste is now recycled and put into landfills.

David finds all sorts of missing items for other people but cannot locate his own possessions.

Explains how to view stars and ways to locate star pictures, known as constellations, throughout the year

Explains how bacteria and viruses affect the human body and how the body fights them.

This book describes how sunshine and the tilt of the earth's axis are responsible for the changing seasons.

A description of sights and experiences on the surface of the moon, based on information gathered by astronauts.

Discusses how scientists, studying fossil remains, provide information on how dinosaurs lived millions of years ago.

Describes, using evidence found in fossil layers, how one-cell organisms evolved into complex plants and animals.

An introduction to the human skeletal system, explaining how the 206 bones of the skeleton join together, how they grow, how they help make blood, what happens when they break, and how they mend.

Read and find out about one of nature's most mysterious forces-the earthquake. Some earthquakes are so small that you don't even feel them, while others can make even big buildings shake! Learn why earthquakes happen, where they are most likely to occur, and what to do if one happens near you.