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How does the sandpaper numbering system work?
home.howstuffworks.com/sandpaper-numbering-system.htm
There are a number of different systems around the world for numbering the grades of sandpaper. Learn about how sandpaper numbering systems work from this article.
How Do Grades of Sandpaper Grit Differ?
home.howstuffworks.com/difference-between-grits-sandpaper.htm
Sandpaper is measured by grit size - the number of sharp particles per square inch. Learn more about the different grits of sandpaper.
How Computer Mice Work
computer.howstuffworks.com/mouse.htm
The mouse might just be the computer user's best friend. Every day of your computing life, you reach out for your mouse whenever you want to move your cursor or activate something. Learn how this human-machine interface translates your movements into digital data.
How Narwhals Work
animals.howstuffworks.com/mammals/narwhal.htm
Narwhals, the unicorns of the sea, are unusual tusked whales who like icy ocean waters. See what else makes narwhals interesting whales indeed.
How StumbleUpon Works
computer.howstuffworks.com/internet/social-networking/networks/stumbleupon.htm
StumbleUpon is an online social network that lets members share their favorite sites with other people. Learn how StumbleUpon lets you stumble sites.
How Investment Diversification Works
money.howstuffworks.com/personal-finance/financial-planning/diversification.htm
Investment diversification helps protect your assets in the long-term. Read about diversification and how to use it when allocating your investments.
Top 10 Mistakes in Kitchen Design
home.howstuffworks.com/home-improvement/home-diy/projects/10-mistakes-in-kitchen-design.htm
Mistakes in kitchen design could prove detrimental if you are trying to sell your house or just be happy with it. Learn these mistakes in kitchen design.
Top 5 Unsolved Brain Mysteries
science.howstuffworks.com/life/inside-the-mind/human-brain/5-brain-mysteries.htm
Take a look at 5 brain mysteries to find out about the workings of the organ in your noggin. These 5 brain mysteries will have you scratching your head.
Headaches 101
health.howstuffworks.com/diseases-conditions/headache/headache.htm
Headaches are a frequent pain (literally) for many. What causes headaches, and can they be prevented? Are primary or secondary headaches more dangerous?
Top 10 Heart Attack Symptoms That Should Have You Calling 911
health.howstuffworks.com/diseases-conditions/cardiovascular/heart/5-heart-attack-symptoms.htm
There are certain heart attack symptoms that should have you calling 911 pronto. Learn about ten major heart attack symptoms and find out why heart attacks occur at all.