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How a Symbiotic Relationship Works
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Symbiosis can be mutually beneficial, helping two creatures survive in a hostile environment. Learn about the different forms of symbiosis.
What Is Deforestation?
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Deforestation, or the removal of forests, contributes to global warming. Learn how deforestation harms our plants and animals -- even to extinction.
How Bird Flu Works
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Bird flu is an infectious disease that has swept through the Asian bird population. Learn how bird flu spreads and the risks posed by antigenic drift and shift.
5 Innovative Social Devices
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Smartphones, tablets and other devices are not just useful; they can improve your social life. We'll look at some of the newest ways to integrate social media into whatever you're doing.
How Aliens Work
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Alien life forms would probably differ from those on Earth but still adhere to certain principles. Learn about astrobiology and the search for alien life forms.
How Your Brain Works
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Every animal you can think of -- mammals, birds, reptiles, fish, amphibians -- all have brains. But the human brain is unique. It gives us the power to think, plan, speak and imagine.
How Mustard Gas Works
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Mustard gas is a chemical warfare agent developed during World War I. Learn how mustard gas affected soldiers and armies used mustard gas.
How Nanowires Work
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Nanowires are incredibly thin structures that have an incredible length-to-width ratio. Learn about nanowires and how nanowires are created.
How Organic Farming Works
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Consumers are becoming more and more knowledgeable about food safety and their health. As a result, organic farming has entered the agriculture mainstream. But what methods must be used, and how is organic farming certified?
10 Weirdest Sources for Antibiotics
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Many lifesaving antibiotics are discovered in some pretty nasty places. Here are the 10 weirdest sources for antibiotics at HowStuffWorks.