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Does mouthwash affect your immune system?
health.howstuffworks.com/human-body/systems/immune/does-mouthwash-affect-immune-system.htm
Some scientists think your mouthwash could be hurting your immune system. Is there something sinister lurking in your oral care routine?
Is gasoline more dense in the morning?
auto.howstuffworks.com/fuel-efficiency/fuel-economy/gasoline-more-dense-in-morning.htm
Is gasoline more dense in the morning? Should you fill up before the afternoon? Find out at HowStuffWorks.
What is cosmological redshift?
science.howstuffworks.com/cosmological-redshift.htm
Cosmological redshift: sounds like the latest blockbuster coming to a theater near you, doesn't it? In reality, it has to do with how light itself travels -- and understanding how it works is essential to advanced space telescope technology.
Quick Tips: Does vegetarianism improve your skin?
health.howstuffworks.com/skin-care/daily/tips/quick-tips-does-vegetarianism-improve-your-skin-.htm
There are certain foods that promote healthy skin, but does cutting out meat give you a glowing complexion? See if vegetarian diets help build healthy skin
Which Historical Figure Are You?
play.howstuffworks.com/quiz/which-historical-figure-are-you
Popular historical figures are remembered for a reason; they've left such a mark on the world that we just can't and don't want to forget about them. Which popular figure would you be? Take this quiz to find out!
Why Do Babies' Eyes Change Color?
health.howstuffworks.com/human-body/systems/eye/babies-eyes-change-color.htm
Nearly all newborns have some shade of blue eyes at birth. But after a few months, they change. What's going on?
The Emotional Intelligence Quiz
play.howstuffworks.com/quiz/the-emotional-intelligence-quiz
Do you have the emotional intelligence of a door handle or that of a true genius? Your emotional IQ has nothing to do with your book smarts or your street smarts. It's all about the way you handle yourself! Where do you fall on the scale?
Could You Be a Spy?
play.howstuffworks.com/quiz/could-you-be-a-spy
Being a spy is a lot more than you'd think based on the movies. Being a spy is part data nerd, part social worker, part businessman, part fixer, and part patriot. Do you have what it takes?
Create Your Own Hogwarts Class Schedule and Find Out Which House You Belong In
Ever wondered what house you would be sorted into if you attended Hogwarts? Well, create a schedule, and we will tell you which what color robes you will be wearing!
What's Your Gaelic Name?
play.howstuffworks.com/quiz/what-is-your-gaelic-name
Gaelic languages, and especially Gaelic names, have a magical quality, in part due to the vanishing and poetic nature of the Gaelic languages. Gaelic names pack a lot of meaning into a few short sounds. Which Gaelic name is meant for you? Take this quiz and find out!