- United States Department of State
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Grasses are the most common plants in grasslands, but there are many types, and grasslands are not...Added June 22, 2010 - This item has been added.
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My new friends have begun to suspect I haven't told them the full story of my life.
"Why did...Added June 22, 2010 - This item has been added.
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Without the different states of matter - the solids, liquids, and gases that make up our universe...Added June 22, 2010 - This item has been added.
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Though the Earth's outermost shell is comprised of tectonic plates that are constantly shifting...Added June 22, 2010 - This item has been added.
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Water covers more than 70 percent of Earth's surface, and all of it is connected in the...Added June 22, 2010 - This item has been added.
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Here is a captivating new introduction to the world's most fascinating caves. ""Caves"" explores...Added June 22, 2010 - This item has been added.
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Tropical forests are the most diverse and complex of the world's ecosystems. They are also among...Added June 22, 2010 - This item has been added.
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Earth's atmosphere supports and protects all of its life, giving the planet its blue skies, mild...Added June 22, 2010 - This item has been added.
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There is no place more remote than the Arctic and Antarctic, but their remoteness has not kept...Added June 22, 2010 - This item has been added.
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In 1991, mountain climbers on the Niederjoch Glacier on the Italian-Austrian border came across...Added June 22, 2010