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How does the sense of smell work?
health.howstuffworks.com/mental-health/human-nature/perception/question139.htm
What causes smell? When I walk into a bakery, I smell the bread. What actually has happened? Do objects give off pieces of matter? What has entered my nose to cause the sensation of smell?
Electronegativity Is Like an Atomic Tug-of-War
science.howstuffworks.com/electronegativity.htm
Electrons are attracted to some atoms more than others. If two atoms are of equal strength, the electrons will be equally shared. If one atom is stronger, the electrons will be pulled in that atom's direction.
How China's Pollution Sniffers Work
science.howstuffworks.com/environmental/green-science/pollution-sniffer.htm
Air pollution in China has spurred the training of air pollution sniffers to detect toxic gas. Read more about air pollution detection through smell.
The Science of Shade: Unlocking Photochromic Lenses
science.howstuffworks.com/innovation/science-questions/question412.htm
How can my glasses change from transparent, when I'm inside, to dark when I go outdoors?
How Cells Work
science.howstuffworks.com/life/cellular-microscopic/cell.htm
The human body is composed of about 10 trillion cells. Everything from reproduction to infections to repairing a broken bone happens down at the cellular level. Find out all about cells.
How can you make a wine glass sing?
recipes.howstuffworks.com/food-facts/question603.htm
How can you make a wine glass sing? Read this article to find out just how can you make a wine glass sing with video instructions and more.
How Vibration Speakers Work
electronics.howstuffworks.com/gadgets/audio-music/vibration-speakers.htm
Vibration speakers work with other surfaces to enhance sounds. Learn all about how vibration speakers work.
Why Do Wint-O-Green Life Savers Spark in the Dark?
recipes.howstuffworks.com/question505.htm
Maybe you've tried this game of biting down on a wintergreen candy in the dark and looking in the mirror and seeing a spark. Where do those sparks come from?
How Plasma Cutters Work
home.howstuffworks.com/plasma-cutter.htm
The metal used to construct buildings resists all sorts of damage, making it a very reliable material -- and very difficult to manipulate into the appropriate form. Enter the plasma cutter. Learn all about the amazing device that cuts through metal like a knife through warm butter.
How DNA Works
science.howstuffworks.com/life/cellular-microscopic/dna.htm
DNA contains genetic material that gets passed down to each successive generation. Learn about DNA and find out what information each strand of DNA contains.