China's Song Dynasty had all the ingredients of a scientific revolution a thousand years ago. Yet it never came. As the home of the U.S. National Geography Standards on the Internet, Xpeditions is the perfect place to explore earthly enigmas or share your geo-genius on any subject under the sun. Crazy in the Congo Big wilderness is important. Let's talk about what we can do to help.
Readers serve up their best backpacking recipes.
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