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Why Do Some U.S. Bills Have a Star at the End of the Serial Number?
Most U.S. currency contains a serial number that ends with a letter, but some end or begin with a star instead. What does the letter stand for? What is the significance of the star?
Do men and women cheat for different reasons?
people.howstuffworks.com/men-women-cheating.htm
Men and women cheating on their partners often do so for different reasons. Learn about gender differences and studies behind men and women cheating.
Does Stress Really Make Your Hair Go Gray?
health.howstuffworks.com/wellness/aging/aging-process/stress-gray-hair.htm
Does stress really cause gray hair? Explore this article to find out where gray hair comes from and what role stress plays in its development.
Why Do Leaves Change Color in the Fall?
science.howstuffworks.com/life/botany/leaves-turn-red.htm
If you ever wondered why leaves change color in autumn, you're not alone. Learn why leaves change color, and how they get that vibrant red hue.
Why is it important to care for the epidermis?
health.howstuffworks.com/skin-care/information/anatomy/care-for-the-epidermis.htm
Why is it important to care for the epidermis? Visit HowStuffWorks to learn why caring for your skin (epidermis) is important.
Why Do We Yawn?
science.howstuffworks.com/life/inside-the-mind/human-brain/question572.htm
What makes us yawn and why does it seem to be contagious? Find the answers to these questions and more about yawning at HowStuffWorks.
Why Is the Sky Blue?
science.howstuffworks.com/nature/climate-weather/atmospheric/sky.htm
We've all probably looked up and wondered why the sky is blue instead of, say, brown. The sky is blue because of the way Earth's atmosphere scatters light from the sun.
Why do teens lie?
lifestyle.howstuffworks.com/family/parenting/tweens-teens/teens-lie.htm
Why do teens lie? Visit HowStuffWorks to learn more about why teens lie -- as if you don't already now why.
Why do men smell different from women?
health.howstuffworks.com/wellness/men/sweating-odor/men-smell-different-from-women.htm
Why do men smell different from women? Visit Discovery Health to learn why men smell different from women.
Why Are My Cuticles and Nails Separating?
health.howstuffworks.com/skin-care/nail-care/cuticle/cuticles-and-nails-separating.htm
Why are my cuticles and nails separating? Visit HowStuffWorks to learn why your cuticles and nails are separating.