Willis, John

Simple text and photographs discuss the mechanisms and uses of fighter jets. Includes online content that contains weblinks, audio and video clips, activities, and other features.

Learn about the MLB team Toronto Blue Jays.

An exploration of water as a basic need, covering how plants and animals use it and water pollution.

A simple introduction to seasons.

Find out exciting facts about piranhas, including how they eat plants as well as meat, how they stay safe by swimming in groups, and more.

Find out exciting facts about orcas, including how they are the largest kind of dolphin, how they use sound to help them catch their food, and more.

Reindeer's ankles make a clicking sound when it walks and have wider feet than any other deer. Discover more about these cold-weather herbivores.

The food flamingos eat colors their feathers and they often stand on just one leg. Discover more about these brightly colored birds.

An introduction to biological adapatations, covering where they are found, different types, how they are studied, and more.