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Why are demons blamed for sleep paralysis?
Why does the experience of sleep paralysis often summon explanations of demonic visitations? Visit the place where dreams and reality overlap, and where science and myth attempt to interpret our hallucinations.
Cobalt: Essential for Batteries and Bright Blues
science.howstuffworks.com/environmental/earth/geology/cobalt.htm
Cobalt is associated with the color blue, but it's so needed for rechargeable batteries that the U.S. put it on the list of minerals it can't live without.
The Fascinating Stories Behind 5 of the World's Big Currency Symbols
money.howstuffworks.com/currency-symbols.htm
Why does the dollar sign have a slash? Did a British pound originally weigh 1 pound? Find out the stories behind these and other currency symbols
12 Renowned Women of the Wild West
history.howstuffworks.com/historical-figures/12-renowned-women-of-the-wild-west.htm
A number of women made names for themselves during the Wild West. Read our list of 12 of the most famous heroines from this time period, including Annie Oakley, Belle Starr, and Calamity Jane.
Tsar Bomba: The Most Powerful Nuclear Weapon Ever Built
science.howstuffworks.com/tsar-bomba.htm
In 1961, the Soviet Union detonated the Tsar Bomba, still the biggest, most powerful nuclear bomb ever built. One of the cameramen who recorded the event said it sounded "as if the Earth has been killed."
What is the difference between a hardwood and a softwood?
science.howstuffworks.com/life/genetic/question598.htm
What is the difference between a hardwood and a softwood? How hard does a tree have to be to be considered hardwood?
Herbal Remedies for Diarrhea
health.howstuffworks.com/wellness/natural-medicine/herbal-remedies/herbal-remedies-for-diarrhea.htm
There are a number of herbal remedies that can relieve some of the pain of diarrhea. Learn which herbs to use to get over a bout of diarrhea.
2007 BRICK Award Winner: Jennifer Staple
money.howstuffworks.com/do-something-brick-awards-winner-jennifer-staple.htm
2007 BRICK Award winner Jennifer Staple's summer job led to a vision for global change, providing eye care to underserved people throughout the world.
How Geothermal Energy Works
science.howstuffworks.com/environmental/energy/geothermal-energy.htm
Geothermal energy is clean, abundant and renewable. Learn about geothermal energy, geothermal heat pumps and geothermal power plants.
Facial Mist Sprays
health.howstuffworks.com/skin-care/cleansing/products/facial-mist-sprays.htm
Facial mist sprays are both refreshing and beneficial for your skin. Learn about how facial mist sprays work at HowStuffWorks.