Lions, elephants, and people may seem very different, and they are in many ways. However, they are also similar in enough ways to classify them all as mammals. Readers learn what common characteristics these and other mammals share as they develop their animal classification skills. Through accessible text, fact boxes, and detailed graphic organizers, readers discover amazing things about some of the world's most impressive and unusual mammals. Vibrant, full-color photographs of these amazing animals add to the engaging reading experience, making common science curriculum topics feel fresh and fun for readers.