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Your search for "natural numbers" returned 3,180 results
What are the dangers of mercury exposure?
home.howstuffworks.com/home-improvement/household-safety/dangers-of-mercury-exposure.htm
What are the dangers of mercury exposure? Find out the dangers of mercury exposure, how to avoid them and how to tell if you've been exposed.
How High-speed Photography Works
electronics.howstuffworks.com/high-speed-photography.htm
High-speed photography records fast-moving objects, capturing images normally invisible to the human eye. Find out about high-speed photography here.
How fast can I get sunburned without protection?
health.howstuffworks.com/skin-care/beauty/sun-care/how-fast-can-i-get-sunburned.htm
How fast can I get sunburned without protection? Visit HowStuffWorks to learn how fast you can get sunburned without protection.
How Digital Clocks Work
electronics.howstuffworks.com/gadgets/clocks-watches/digital-clock.htm
When you need to know the time, it's about a 50-50 chance you'll turn to some LEDs to find out. Ever wonder what goes on inside a digital clock or wristwatch? Find out about this basic digital technology -- and learn how to create your own digital timekeeper.
How Bonsai Works
home.howstuffworks.com/bonsai.htm
Bonsai is an ancient form of gardening that many consider to be art. Learn more about bonsai and the rich history that comes with it.
How bad for you is high-fructose corn syrup?
recipes.howstuffworks.com/high-fructose-corn-syrup.htm
High-fructose corn syrup, or HFCS, is in nearly everything you eat. Is high-fructose corn syrup worse than sugar and other artifical sweeteners?
Did You Know There Are 23 Countries in North America?
history.howstuffworks.com/north-american-history/countries-in-north-america.htm
North America is the world's third largest continent by land area, bordered by the Arctic Ocean to the north, the Atlantic Ocean to the east, the Pacific Ocean to the west, and South America and the Caribbean Sea to the south. This incredible size means there are quite a few countries in North America.
Is Insect Repellent Bad for Your Skin?
health.howstuffworks.com/skin-care/beauty/skin-and-lifestyle/insect-repellent-skin.htm
Insect repellent on skin -- is it safe? Take a look at what is in insect repellents and if it is safe to have insect repellent on skin.
Test Your Vocabulary With This Quiz!
play.howstuffworks.com/quiz/you-pass-this-difficult-vocabulary-test-you-deserve-a-phd
Want to test your smarts without the headache of a graduate program? Take this vocabulary quiz, and let's find out if you're smarter than a Ph.D. student.
10 Most Dangerous Places for Shark Attacks
animals.howstuffworks.com/fish/sharks/dangerous-place-shark-attack.htm
Dangerous places for shark attacks dot the globe, but some spots rate higher than others. See where the most dangerous places for shark attacks are.