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Portland Cement: A Concrete History With Structural Integrity
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Invented in 1824, Portland cement remains prominent in modern construction. Learn about the hydraulic binder's raw materials and applications.
After the Attack on Salman Rushdie: What a Fatwa Is — and Isn't
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The recent attack on author Salman Rushdie led many to conclude that it was the result of the fatwa issued against him in 1989 by the Ayatollah Ruhollah Khomeini. But what exactly is a fatwa?
Are We Entering the Sixth Major Extinction on Earth?
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A new global report says 1 million species are at risk of extinction - the greatest number in human history.
White to Green Perennial Flowers
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White to green perennial flowers blend in naturally with foliage, and provide an airy look. Learn which of these hardy blossoms is right for you.
How do conference calls work?
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How do conference calls work?
Materials
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The tools and methods you use depend upon the materials with which you're working. Learn about materials, and how they affect your home repairs.
What antibiotics can help treat respiratory infections?
What antibiotics can help treat respiratory infections? Visit HowStuffWorks to learn what kinds of antibiotics can help treat respiratory infections.
Harnessing the Power of the Master Numbers
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Explore the depth of Master Numbers. Discover their unique symbolism, spiritual significance, and numerological impact.
How Tunnels Work
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Constructing a tunnel is one of the most complex challenges in the field of civil engineering. Learn about the basics behind tunnels.
Knee Replacement Overview
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Getting a knee replacement is often a last resort for those whose knees are destroyed by arthritis or wear and tear. Learn about knee replacements.