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Symbiosis can be mutually beneficial, helping two creatures survive in a hostile environment. Learn about the different forms of symbiosis.

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The Taser shotgun shell is a small version of the Taser that can be loaded into a shotgun and fired. Learn about the Taser shotgun shell.

Want to know how to match colors to your skin tone? Visit HowStuffWorks to learn how to match colors to your skin tone.

Photographs have recently shown that there may be water on Mars. Find out if there's water on Mars and what that could mean for life on Mars.

Brain-computer interfaces allow you to manipulate computers and machinery with your thoughts. Learn more about brain-computer interface technology.

Some items are worth paying full price. Read about 10 things that never go on sale at TLC.

Light pollution is explained in this article. Learn about light pollution.

Do you know how the Bulova Precisionist watch works? Find out how precise the Precisionist really is.

Desalination is the process of removing the salt from seawater, which turns the water into fresh drinking water. Learn about desalination.

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