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How Air Purifiers Work
home.howstuffworks.com/air-purifier.htm
Americans spend an estimated $250 million annually on air purifiers for their homes. Learn why people buy air purifiers and how they work.
How Thermal Imaging Works
electronics.howstuffworks.com/thermal-imaging.htm
Thermal cameras take photos of heat, rather than visible light. Find out how temperature is captured as an image.
What If There Were No Stars?
science.howstuffworks.com/science-vs-myth/what-if/what-if-there-were-no-stars.htm
Assuming we got to keep the sun, how bad would be for travelers to not have these little guiding lights? And what else might have changed in history without stars?
How Electronic Tattoos Work
electronics.howstuffworks.com/gadgets/other-gadgets/electronic-tattoo.htm
Electronic tattoos aren't just cool, they could also save your life someday. See how electronic tattoos work.
10 Earth Day Activities to Celebrate Our Planet
science.howstuffworks.com/environmental/green-science/10-ways-celebrate-earth-day.htm
Earth Day is the ideal time of the year to form new eco-oriented habits. Here are 10 things you can do to celebrate our planet all year long.
Pickup Truck Trivia Quiz
play.howstuffworks.com/quiz/pickup-truck-trivia-quiz
Pickup trucks have grown in popularity in the past few decades. Nowadays, they are just as spacious and luxurious as many cars on the road. But how much do you know about this versatile vehicle?
How Google Fiber Works
computer.howstuffworks.com/google-fiber.htm
Is Google's broadband all it's cracked up to be? Get the scoop on Google Fiber.
Are These Christmas Traditions From the Past Real or Fake?
play.howstuffworks.com/quiz/are-these-christmas-traditions-from-the-past-real-or-fake
Are you sure you know about the real origins of tree decorating? What about the reason we send Christmas cards every December? This quiz will leave you knowledgeable about all things Christmas past - and how those traditions shape our experiences today!
How Calculators Work
electronics.howstuffworks.com/gadgets/other-gadgets/calculator.htm
Calculators may show up anywhere in our lives that numbers do -- from calculus class to restaurants. See how calculators work.
7 Cults in America: A History of Infamy
people.howstuffworks.com/cults-in-america.htm
Cults are not unique to the United States, but there is a long history of cults in America. "Compared to other developed nations, the U.S. does have this consistent relationship with cults," Amanda Montell, author of "Cultish: The Language of Fanaticism," tells LitHub. "Whenever I talk to my friends who are not American and I tell them I'm writing this book about cults, their eyes do not light up the same way that Americans' eyes do.