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Skin Type Image Gallery
health.howstuffworks.com/skin-care/information/skin-types/skin-type-pictures.htm
How much do you know about skin types? Do you know your skin type? Scroll through these pictures to learn about skin types.
How Light Sticks Work
science.howstuffworks.com/innovation/everyday-innovations/light-stick.htm
Light sticks produce a mesmerizing neon glow before slowly extinguishing. Learn about light sticks, chemical light sticks and how they work.
How Air-breathing Rockets Will Work
science.howstuffworks.com/air-breathing-rocket.htm
Air-breathing rockets have the potential to dramatically lower launch costs and may make space lots more accessible to normal people. See how it will work!
What's a mild hybrid system?
auto.howstuffworks.com/fuel-efficiency/hybrid-technology/mild-hybrid.htm
Mild hybrid systems offer fuel-efficiency and convenience. Learn what a mild hybrid system does in this article.
Should we be worried about the dead zone in the Gulf of Mexico?
science.howstuffworks.com/environmental/earth/oceanography/dead-zone.htm
The Dead Zone is a vast area off the Gulf of Mexico, larger than several U.S. States, that is deadly to marine life. Learn more about the Dead Zone.
What Is Octane and How Does It Work?
auto.howstuffworks.com/fuel-efficiency/fuel-consumption/question90.htm
Adding a chemical called tetraethyl to fuel can significantly improve the gasoline's octane rating. But what is octane? And how does it improve the gasoline we buy? Read on to explore this fascinating molecule.
What does 'dry down' mean?
lifestyle.howstuffworks.com/style/body-scents-fragrances/dry-down.htm
The dry down period is part of the perfume process. Find out what dry down is and how it affects the way we smell.
Testosterone
health.howstuffworks.com/human-body/systems/endocrine/testosterone.htm
Testosterone is one of the most important, but commonly misrepresented hormones found in the body. Learn about the role of testosterone.
1212 Angel Number: Meaning, Symbolism, and Guidance
science.howstuffworks.com/science-vs-myth/extrasensory-perceptions/1212-angel-number-meaning.htm
Discover the enlightening 1212 angel number meaning. Explore its profound symbolism and the guidance it offers for your life's path.
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.