I wonder why

Poses and answers thirty-one questions about mountains, such as: Can snow move mountains?, How high do birds nest? and Why do climbers wear spikes?.

Answers a wide variety of questions about the invention of common household items.

Provides answers to more than thirty questions about polar regions and animals, discussing weather, igloos, muskoxen, penguins, polar seas, and more.

Addresses basic physiology in a question and answer format, covering why one has bones, why one needs food, and how the body grows.

Presents information on volcanoes, floods, hurricanes, and other natural disasters, in a question and answer format, and includes explanations of how they happen.

Addresses basic physiology in a question and answer format, covering why one has bones, why one needs food, and how the body grows.

Answers questions about people, places, and things including, "Where do elephants glow in the dark?" and "Where does chocolate grow on trees?".

Illustrations and text answer questions about extinct and endangered animals.