This colorful, stimulating guide will enthrall readers as they explore the history and development of mammalian life. They will absorb information on areas such as what sets mammals apart from other classes of animals, whether humans are the most evolved mammals, and the adaptations of mammalian species in different ecosystems across the world. Detailed diagrams and striking images accompany this accessible text as well, enriching the journey readers will take as they discover the traits of the smallest rodent, the biggest whale, and everything in between.