I wonder why

Questions and answers about various dinosaurs including which dinosaurs fished, did dinosaurs sing or swim, and which was the biggest dinosaur?.

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 questions about extinct animals and animals in danger of becoming extinct, with a focus on reasons for endangerment and conservation efforts.

Provides the answers to forty questions about mosquitos, bees, grasshoppers, and other insects and spiders.

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

Questions and answers about our planet such as what are clouds made of and which is the coldest place in the world?.

A collection of questions and answers about the oceans including "What is sand made of?" and "Which sea animals sing like canaries?".

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?.

Questions and answers explore the world of plants, covering such aspects as leaves, roots, stems, seeds, and fruit.

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