Mammals are our closest relatives in the animal kingdom; most are beautiful, and many are highly intelligent and have intricate social systems. They are found in all kinds of habitats; they may have fur, scales, or spines; they move by hopping, swimming, running, or flying. What all mammals share, apart from certain anatomical similarities, is the unique ability to nourish their young with milk from mammary glands. Many species of mammals are severely threatened by habitat destruction and encroachment, and some face extinction within the near future. A better understanding and appreciation of mammals by humans is essential to their survival. This lavishly illustrated book presents in a lively and visually stimulating way the most recent findings of scientific research. Authoritative text written by the world's leading mammalogists is enhanced by over 200 superb photographs and over 100 original paintings, diagrams, and maps to give an up-to-date overview of our knowledge of the fascinating lives of animals.