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How the CPR Doll Developed From a Famous Parisian Death Mask
history.howstuffworks.com/european-history/cpr-doll-history.htm
CPR Annie has been called "the most-kissed face in the world." But the doll's look was improbably inspired by a famous Parisian death mask.
Stardust and Scandal: The Hollywood Sign Turns 100
history.howstuffworks.com/american-history/hollywood-sign-birthday.htm
There is no more iconic sign in the world than the huge HoIlywood sign that stands in Griffith Park, beckoning the hopeful with dreams of stardom.
404 Angel Number: Meaning, Spiritual Messages, and Guidance
science.howstuffworks.com/science-vs-myth/extrasensory-perceptions/Angel-Number-404.htm
Discover the hidden spiritual messages behind 404 and what your angels are trying to tell you.
15 Butterfly Species to Spot on (Almost) Every Continent
animals.howstuffworks.com/insects/butterfly-species.htm
Butterflies aren't just colorful decorations fluttering around flowers. They are one of the most diverse groups of insects, with more than 17,000 known species.
How Motorcycles Work
auto.howstuffworks.com/motorcycle.htm
Motorcycles are an increasingly popular form of transportation. Learn about motorcycles and motorcycle types, and check out pictures of motorcycles.
How Sunglasses Work
science.howstuffworks.com/innovation/everyday-innovations/sunglass.htm
Whether you're hitting the surf or the slopes or just spending a day on the lake, sunglasses are a must-have accessory. Find out if the $10 sunglasses are as good as the high-cost ones.
How Transistors Work
electronics.howstuffworks.com/transistor.htm
The transistor moved the world from power-hungry vacuum tubes to portable solid-state electronics. Learn about transistors and how they changed electronics.
How Noise-canceling Headphones Work
electronics.howstuffworks.com/gadgets/audio-music/noise-canceling-headphone.htm
Noise-canceling headphones are designed to maximize your listening experience. Learn how noise-canceling headphones keep ambient noise out without sacrificing your music's sound quality.
How Repo Trucks Work
auto.howstuffworks.com/repo-truck.htm
Professional repo men use specialized repo trucks that can hookup a car and drive off in about 10 seconds. Find out how repo trucks work in this article.
How Liquefied Petroleum Gas Works
auto.howstuffworks.com/fuel-efficiency/alternative-fuels/lpg.htm
You probably know it as the stuff that fuels a gas grill or a Zippo lighter, but that's just the beginning. People are modifying cars to run on the stuff. Learn all about liquefied petroleum gas.