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What Is a Number?: Mathematical Concepts and Their Origins (English)

Mathematics often seems incomprehensible, a melee of strange symbols thrown down on a page. But...Added June 22, 2010
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Grasslands (English)

Grasses are the most common plants in grasslands, but there are many types, and grasslands are not...Added June 22, 2010
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Careers for Scientific Types: And Others with Inquiring Minds (English)

A career in science—the logical choice! Do you consider yourself a logical person? Are you...Added June 22, 2010
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The Sahara Desert (English)

Our world abounds with the wonders of natural beauty. Readers of the books in this series will...Added June 22, 2010
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States of Matter: Gases, Liquids, and Solids (English)

Without the different states of matter - the solids, liquids, and gases that make up our universe...Added June 22, 2010
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Earthquakes and Volcanoes (English)

Though the Earth's outermost shell is comprised of tectonic plates that are constantly shifting...Added June 22, 2010
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Rivers, Lakes, and Oceans (English)

Water covers more than 70 percent of Earth's surface, and all of it is connected in the...Added June 22, 2010
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Thin Ice: Unlocking the Secrets of Climate in the World's Highest Mountains (English)

"One of the best books yet published on climate change . . . The best compact history of the...Added June 22, 2010
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Caves (English)

Here is a captivating new introduction to the world's most fascinating caves. ""Caves"" explores...Added June 22, 2010
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Tropical Forests (English)

Tropical forests are the most diverse and complex of the world's ecosystems. They are also among...Added June 22, 2010