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Cinnabar: Red, Beautiful — and Toxic
science.howstuffworks.com/environmental/earth/geology/cinnabar.htm
Cinnabar's bright-red pigment has been used in jewelry, pottery and makeup for millennia. But cinnabar is also the primary ore for mercury, making it a dangerous mineral if the particles are inhaled.
Twinkle, Twinkle: The Ultimate Stars Quiz
science.howstuffworks.com/stars-quiz.htm
Stars are giant nuclear fusion reactors, and we wouldn't exist without them. Find out how much you know about these twinkling lights with our quiz.
What's HVAC? Heating and Cooling System Basics
home.howstuffworks.com/home-improvement/heating-and-cooling/heating-and-cooling-system-basics-ga.htm
Heating systems keep our homes warm during the winter, and air conditioning keeps us cool in summer. But do you know how HVAC systems work?
Is expensive cookware worth it?
recipes.howstuffworks.com/tools-and-techniques/is-expensive-cookware-worth-it.htm
If you've shopped for cookware lately, you've probably noticed the shocking price range for pots and pans. Is expensive cookware worth it though?
Does an Elephant Tattoo Truly Symbolize Good Luck?
people.howstuffworks.com/elephant-tattoo-meaning.htm
Discover the deep symbolism behind elephant tattoos. Learn about their meanings in strength, wisdom, luck, and spirituality across different cultures.
The General Science Quiz
play.howstuffworks.com/quiz/the-general-science-quiz
You spent a lot of time sitting in science classes -- But do you remember any of what you learned, or did you forget it right after the test? Take this quiz to prove your general science IQ!
Get Inked: A Tattoo History Quiz
play.howstuffworks.com/quiz/get-inked-a-tattoo-history-quiz
Tattooing has exploded as an art form over the past 20 years, but it's an old practice with a lot of history. Can you stick and poke your way to a high score with some serious tattoo knowledge? Test your tattoo savvy with this HowStuffWorks quiz.
How dangerous is sewage?
home.howstuffworks.com/home-improvement/plumbing/dangerous-sewage.htm
Sewage that is left untreated can have a deadly impact on the environment. Learn how dangerous sewage is in this article.
Did the Nazis invent the Volkswagen Beetle?
Did the Nazis invent the Volkswagen Beetle? Find out more about 'The People's Car' at HowStuffWorks.
Time, Space and Everything in Between: The Astrophysics Quiz
play.howstuffworks.com/quiz/astrophysics-quiz
The field of astrophysics covers some of the biggest questions about the universe. How did it form? What will happen to it? How do solar systems form? What are stars made of? Is time travel possible? Test your smarts on astrophysics with this quiz.