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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.
Lifelike Robo Pets Help Seniors Combat Loneliness
health.howstuffworks.com/mental-health/dementia/robotic-pets.htm
Robotic companion animals have been proven to reduce stress, anxiety and antipsychotic drug use among older people, especially those with with dementia.
Portland Cement: A Concrete History With Structural Integrity
science.howstuffworks.com/innovation/inventions/portland-cement.htm
Invented in 1824, Portland cement remains prominent in modern construction. Learn about the hydraulic binder's raw materials and applications.
The Fascinating World of Itchy Noses: Superstitions and Meanings Explained
people.howstuffworks.com/nose-itching-superstition.htm
Explore the intriguing nose itching superstition. Uncover cultural beliefs and meanings. Delve into the world of superstitious nose itching.
How Steadicams Work
entertainment.howstuffworks.com/steadicam.htm
Some of the greatest movie scenes of all time were filmed using Steadicams. They allow moviemakers to produce moving, hand-held shots that have no shakes at all. Learn all about this ingenious camera system.
How Cell-phone Radiation Works
electronics.howstuffworks.com/cell-phone-radiation.htm
Cell-phone radiation has been debated for years now. Find out what the buzz is about and how to protect yourself when choosing and using a cell phone.
Do I really need a digital converter box for my TV?
electronics.howstuffworks.com/digital-converter-box.htm
A digital converter box will soon be required for TVs that aren't connected to digital cable. Find out if you'll need a digital converter box.
Is fluoride considered a poison in most European countries?
health.howstuffworks.com/wellness/oral-care/products/fluoride-poisoning.htm
Fluoride is commonly added to drinking water but could be dangerous. Learn about fluoridation and fluoride poisoning.
Is science phasing out sleep?
science.howstuffworks.com/life/sleep-is-so-last-year.htm
Human beings have always found ways to ward off the effects of sleep deprivation. The newest wake-up pill has all of the benefits of caffeine and amphetamines with none of the down sides.
How Solar- vehicle Ventilators Work
auto.howstuffworks.com/fuel-efficiency/hybrid-technology/solar-powered-vehicle-ventilators.htm
Solar vehicle ventilators are great automotive gadgets. Learn more about solar vehicle ventilators at HowStuffWorks.