This is a highly popular and long-running series that explores the questions that young readers ask about the world around them in an unrivalled child-friendly style.

The conversational format is perfect for delivering solid information in a natural, amusing and imaginative way. "I Wonder Why Lemons Taste Sour" takes a look at human and animal senses.

Learn how humans differ from animals and what super senses certain creatures have, for example a dog's acute hearing and strong sense of smell, or echolocation - the extra sense of some creatures such as bats, whales and dolphins.