Unearth a treasure trove of geological knowledge with this in-depth guide to over 500 rocks and minerals Learn how rocks are formed and how to recognize them by their unique qualities and colors. This is a wonderful book for beginners, students and rock collecting enthusiasts that includes the latest scientific research and specimen classification.

Este libro ofrece una amplia e interesante vision del admirable mundo que se desarrolla bajo nuestros pies.

Questions and answers present information about the balance of nature, and the ways that human behavior affects this delicate system.

Photographs and text explore the anatomy and life cycle of trees, examining the different kinds of bark, seeds, and leaves, the commercial processing of trees to make lumber, the creatures that live in trees, and other aspects.

Una extraordinaria vision en primer plano del asombroso mundo natural de los rios, las lagunas y su entorno.