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Prairie dogs, vultures, grasshoppers, goldfinches, pocket gophers, and bison are some of the many animals that make up a grassland food web. But do you know how the many types of grasses in a grassland benefit these animals? Or how earthworms and other decomposers play an important role in the food web? See grassland food webs in action in this fascinating book.

Did you know people can dig underground and use Earth's heat to make energy? This geothermal energy can power the computer and heat or cool your home. How exactly do we get it, though? And what is the impact on our environment? Read this book to find out all about geothermal energy.

Every year, scientists send people and robots into our solar system to explore space. How are scientists preparing for journeys to Mars? What are robotic explorers and how do they study the incredible planets and moons at the outer reaches of our solar system? Learn more about these thrilling missions.