4 - 8 years. There are thousands of volcanoes all over the world. Some erupted millions of years ago and are quiet now. Others are newer and still active. Still others are being formed right now. Geologists study volcanoes-and so can you. Learn how the very structure of the earth predicts where they are found, and explains how they form and what makes them suddenly, and violently, erupt. Paperback. 32 pages.
4 - 8 years. Readers follow two enthusiastic rock hounds around the globe as they add to their collection. Along the way they will learn how sedimentary, metamorphic, and igneous rocks are formed. From the Egyptian pyramids to Roman roads, from the diamond ring on your finger to the pebbles under your feet -- rocks are everywhere! Paperback. 32 pages.
4 - 8 years. Long ago, dinosaurs ruled the Earth. Then, suddenly, they died out. For thousands of years, no one knew these giant creatures had ever existed. Then people began finding fossils -- bones and teeth and footprints that had turned to stone. Today, teams of experts work together to dig dinosaur fossils out of the ground, bone by fragile bone. Then they put the skeletons together again inside museums, to look just like the dinosaurs of millions of years ago. Paperback. 32 pages.