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How the Toto Washlet Works
home.howstuffworks.com/toto-washlet.htm
The Toto Washlet, a toilet seat with a personal spray jet, is marketed as a cleaner -- and greener -- alternative to toilet paper. How does this bidet-like product work to keep you fresh?
What's Your Jewelry IQ?
play.howstuffworks.com/quiz/whats-your-jewelry-iq
Are you as smart about gems and jewelry metals as you think you are? From diamonds to moissanite, there's a lot to know. Show off your jewelry IQ in this quiz, and then you can consider yourself an expert!
How Tessellations Work
science.howstuffworks.com/math-concepts/tessellations.htm
Mathematics achieves the sublime. Sometimes, as with tessellations, it rises to art. In their simplest form, tessellations consist of a single shape that repeats over a two-dimensional plane without any gaps. Why was M.C. Escher so fixated on them?
How Plasma Rockets Work
science.howstuffworks.com/plasma-rockets.htm
Imagine if we could get to Mars in 40 days instead of seven months! It could happen if we used plasma rockets, which travel at 34 miles per second. But how do we make this a reality?
How much vitamin D do you get from the sun?
health.howstuffworks.com/wellness/food-nutrition/vitamin-supplements/how-much-vitamin-d-from-sun.htm
Getting vitamin D from the sun is one of the best ways to get your requirements. But exactly how much vitamin D do you get from the sun? Find out.
How the Doppler Effect Works
science.howstuffworks.com/science-vs-myth/everyday-myths/doppler-effect.htm
The Doppler effect is why you hear the sound from a moving object change as it nears and passes you. Find out how the Doppler effect works.
How the 2009 Chevrolet Corvette ZR1 Works
auto.howstuffworks.com/corvette-zr1.htm
The Chevrolet Corvette ZR1 has been developed to compete directly with supercars from Ferrari and Porsche. Learn about the Chevrolet Corvette ZR1.
How Liquid Body Armor Works
science.howstuffworks.com/liquid-body-armor.htm
One of the newest types of body armor is both flexible and lightweight. Learn whyliquid body armor has the potential to be a good replacement for or supplement to bulkier vests.
How the Tesla Roadster Works
auto.howstuffworks.com/tesla-roadster.htm
The Tesla Roadster is fast, fancy, handles like a dream, and goes like a rocket but it's virtually silent. Tesla's first production car is also the world's first high-performance electric car.
What can your spit tell you about your DNA?
science.howstuffworks.com/life/genetic/spit-dna.htm
Doctors always want your blood, but one day, a health care professional may ask you to open up and say, "Ptooey!" Why? Your spit holds a mother lode of biological information.