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How Hair Coloring Works
science.howstuffworks.com/innovation/everyday-innovations/hair-coloring.htm
Got a few grays? Just want a new look? Well, if you are like 75 percent of women, you're part of a billion dollar industry. Learn all about hair coloring and choosing the best color for you.
How Hair Dye Turns Your Hair That Great Shade of Pink or Purple
Whether you want pink or silver or jet black hair, the BrainStuff team explains how hair dye works to give you your color of choice in this video.
How Handwriting Analysis Works
science.howstuffworks.com/handwriting-analysis.htm
When there's a suspect in a crime and the evidence includes a handwritten note, investigators may call in handwriting experts to see if there's a match. How exactly do experts go about analyzing someone's handwriting?
How Has NASA Improved Solar Energy?
science.howstuffworks.com/innovation/nasa-inventions/nasa-improve-solar-energy.htm
Solar energy is an up-and-coming field, but did you know that it owes much of its growth to NASA? Discover how NASA's research and development of solar power for space has trickled down to the Earthly realm.
How Hate Works
science.howstuffworks.com/life/inside-the-mind/emotions/hate.htm
What is going on in our brains when we hate? Can hate ever be a good thing? Read more about hate at HowStuffWorks.
How HeLa Cells Work
science.howstuffworks.com/life/cellular-microscopic/hela-cell.htm
While HeLa cells have been star players in medical research for decades, the woman behind them remained in the shadows for years. Discover the amazing story of Henrietta Lacks and her immortal cells in this article.
How Helicopters Work
science.howstuffworks.com/transport/flight/modern/helicopter.htm
Believe it or not, the marvel we know as the helicopter began as a Chinese top consisting of a shaft - a stick - adorned with feathers on one end.
How Helium Balloons Work
science.howstuffworks.com/helium.htm
Helium balloons tend to fascinate adults and children alike (and it's not just the Donald Duck voice thing, though that is a big draw). Learn all about helium and why it floats!
How Hereditary Illnesses Work
science.howstuffworks.com/life/genetic/how-hereditary-illnesses-work.htm
Hereditary illnesses can be frightening to new parents, but they are usually rare. Learn about various genetic diseases and their causes.
How High-tech Fabrics Cool You Down When You Heat Up
science.howstuffworks.com/innovation/everyday-innovations/cooling-fabrics.htm
Researchers are constantly developing fabrics that can help keep you cool, whether you're working out or trying to get a good night's sleep. But how do they work, and which are the best ones?