An introduction to the study of mammals living and extinct

This listening guide walks you through the fascinating world of mammals, introducing both the creatures that roam today and the ones we know only from fossils. It starts with the defining traits that set mammals apart—warm‑blooded bodies, hair, specialized teeth—and builds a picture of how these features have evolved. The narration draws on the authors’ long experience in natural history, and the original illustrations are described so listeners can picture each animal as it is discussed.

The material is organized into compact chapters on anatomy, the dental system, the skeletal framework, and major organ groups, each explained in clear, accessible language. While the work surveys all the major orders, it spends extra time on particularly interesting or well‑known groups, giving a richer sense of their habits and adaptations. Ideal for students, amateur naturalists, or anyone curious about the diversity of the mammal class, the book offers a solid foundation without overwhelming detail.