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How Dark Matter Works
science.howstuffworks.com/dictionary/astronomy-terms/dark-matter.htm
For decades, stargazing scientists have been facing their own darkness on the edge of town as they try to explain one of astronomy's greatest mysteries: dark matter. Have they been successful, or will the universe carry its secrets for a long time?
How Sign Language Works
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Sign language has been used for centuries as a way to communicate with the deaf. Learn about sign language and see pictures of the sign language alphabet.
10 Big Questions in the U.S. Gun Control Debate
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The U.S. gun control debate is controversial and multifaceted. Learn about 10 of the big questions in the U.S. gun control debate at HowStuffWorks.
How Better Business Bureaus Work
money.howstuffworks.com/better-business-bureau.htm
A Better Business Bureau tries to resolve disputes between consumers and businesses. Learn about Better Business Bureas, or BBBs, and how they work.
How Area 51 Works
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Less than 100 miles from Las Vegas, is the most famous secret military installation on the planet: Area 51. For decades, the U.S. government refused to acknowledge it existed. But now, the secret is out.