I wonder why

Answers questions about space such as, "Are stars star-shaped," "Which is the coldest planet," and "What is a black hole.".

Answers such questions about reptiles as why do snakes stare, are frogs and newts reptiles, and which reptile lives longest.

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

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

In a question and answer format addresses basic physiology, such as why one has bones, why one needs food, and how the body grows.

Examines various environmental issues, and answers questions for children, and describes why there is life on Earth, discusses the ozone, pollution, improving homes to become more environmentally friendly, and other related topics.

Answers a variety of questions about baby animals and their parents.

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

Questions and answers about castles, knights, and the times of long ago.

Answers such questions about birds as why a budgie cocks its head, which bird likes to paddle in the mud, and whose nest has central heating.