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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.

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.