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Trained pigs can sniff out truffles as deep as 3 feet (1 meter) underground. For thousands of years, animals have lived side by side with people, helping humans to achieve incredible things. In this exciting new True Book series, readers will find out what role animals such as dogs, horses, and monkeys are continuing to play in human lives around the world. Key Features: Timelines show how animals have helped humans throughout history Colorful photographs show animal helpers in action Glossaries explain difficult terms in a way that makes them easy to understand Sidebars provide in-depth info some of the most remarkable animal helpers www.factsfornow.scholastic.com See inside front cover for more information.