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The United States stretches from the Pacific Ocean in the west to the Atlantic Ocean in the east. This vast country includes plains, mountain ranges, deserts, tundra, and even volcanic islands. Find out more in United States, one of the titles in the Countries of the World series.

The United States stretches from the Pacific Ocean in the west to the Atlantic Ocean in the east. This vast country includes plains, mountain ranges, deserts, tundra, and even volcanic islands. Find out more in United States, one of the titles in the Countries of the World series.

The Liberty Bell is a symbol of freedom across the United States and around the world. The bell was made to hang from the steeple of the Pennsylvania State House, now known as Independence Hall, in Phildelphia. Find out more in Liberty Bell, one of the titles in the Icons of America series.

The Liberty Bell is a symbol of freedom across the United States and around the world. The bell was made to hang from the steeple of the Pennsylvania State House, now known as Independence Hall, in Phildelphia. Find out more in Liberty Bell, one of the titles in the Icons of America series.

This innovative title explores the ways that critical thinking can be applied to problem solving in school, work, and social settings. Real-world examples and opportunities for hands-on practice support readers as they learn how to frame, analyze, and synthesize information. Readers are also encouraged to ask questions to clarify points of...

More than 1 million avalanches take place around the world each year. They can move as fast as 185 miles (300 kilometers) per hour. Learn more in Avalanches, one of the titles in the Forces of Nature series.

A tapeworm can grow to be more than 75 feet (23 meters) long. The world's largest flower, the rafflesia, is a parasite. Learn more in Parasites, one of the titles in the Nature's Food Chains series.

Did you know that the Liberty Bell was almost 100 years old when a crack began to show? It was rung for the last time in 1846. Learn more about this fascinating symbol in Liberty Bell, a title in the Symbols of America series.

Author Suzanne Collins spent about 10 months writing the first draft of her best-selling novel, The Hunger Games. The Hunger Games trilogy was later turned into four blockbuster movies. Learn more in The Futuristic World of Suzanne Collins, one of the titles in the Great Storytellers series.

Learn all about the United States of America including facts about tourism, plants and animals and government.

Tsunamis are large waves caused by sudden movements of the ocean floor. These waves can travel across the ocean at speeds up to 500 miles (800 kilometers) per hour. Learn more in Tsunamis, one of the titles in the Forces of Nature series.

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How was the solar system created? Why are the Sun and Moon the same size in the sky? These are just some of the questions answered in this exciting book about our seemingly endless solar system. Readers will love the problem-solving focus that makes space exploration an adventure in innovation."--

How soon can you board a rocketship to Mars? And how will you survive when you get there? There are so many challenges to overcome in sending a human into space, such as problems of distance, fuel, and propulsion. This compelling book describes the history and future of space travel and the exciting areas of research travel presents."--

How was the solar system created? Why are the Sun and Moon the same size in the sky? These are just some of the questions answered in this exciting book about our seemingly endless solar system. Readers will love the problem-solving focus that makes space exploration an adventure in innovation."--

How soon can you board a rocketship to Mars? And how will you survive when you get there? There are so many challenges to overcome in sending a human into space, such as problems of distance, fuel, and propulsion. This compelling book describes the history and future of space travel and the exciting areas of research travel presents."--

Automobile companies and the military must keep secret the development of cutting-edge transportation technology to stay one step ahead of competitors and enemies. Readers will love this awesome book which describes car labs where researchers develop the latest super-secret models, and how technology experts in the military develop new ways for vehicles to go undetected."--Provided by publisher.

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