- United States Department of State
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Where did the universe begin? Are black holes real? You'll get a big bang out of superstar...Added August 14, 2014 - This item has been added.
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The relationship between human progress and its effect on the natural environment has long been a...Added August 14, 2014 - This item has been added.
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Learn how hydrofracking works and explores the controversy surrounding its potentially harmful...Added August 14, 2014 - This item has been added.
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Can anything escape the gravitational pull of a black hole?
A True Book: Space series dives into...Added August 14, 2014 - This item has been added.
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Explore the lives of some of the most important leaders and innovators in recent history with this...Added August 14, 2014 - This item has been added.
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Look! Up there! In the tree! Is it a bird, a mammal, an insect? From the highest part of the rain...Added August 14, 2014 - This item has been added.
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Look! Up there! In the tree! Is it a bird, a mammal, an insect? From the highest part of the rain...Added August 14, 2014 - This item has been added.
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Whether you're interested in weather, oceans, or even the prehistoric world, earth science covers...Added August 14, 2014 - This item has been added.
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History comes alive through the eyes of a young American girl
There are two secrets Evelyn...Added August 14, 2014 - This item has been added.
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From the New York Times-bestselling team behind Chasing Vermeer comes another thought-provoking...Added August 14, 2014