In the 4.6 billion years since Earth was formed, many plant and animal species have come and gone. Fossils are one of the most important tools we have for learning about long-extinct wildlife. Readers
Humans have long held an interest in the bright, colorful crystals we call gemstones. Throughout history, they have been used as decorations, folk remedies, and currency. Readers will discover how gem
From rocks and gems to salts and other substances found in water and soil, minerals make up a large part of our world. Readers will learn what sets different kinds of minerals apart from one another,
From huge, craggy boulders and tiny, smooth pebbles to the stones used to construct buildings, rocks are almost everywhere we look. Readers will learn how rocks are formed, why some are so different f
Discusses how science careers can be full of adventure and excitement as readers learn about researchers who study the insides of active volcanoes, inventors who build new robots, and divers who swim
