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Through space exploration humans have learned a great deal about the planets, stars, and other objects in space. More than five thousand spacecraft have been launched into space to gather information since 1957. Without space travel, NASA may never have developed many of the things we take for granted today, such as cell phone cameras, CAT scans, and ski boots. This useful and interesting resource discusses the many types of manned and unmanned spacecraft,...
Author
Language
English
Description
One of the fastest ways for many people to travel together over land is by train. Although train travel in America is not as popular as it was a century ago, it continues to convey a sense of mystery and romanticism in our minds. This fully illustrated, informative resource for young readers introduces the history of the railroad, explains how trains are powered, examines modern high-speed trains used in other parts of the world, and looks to the...
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