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Why Do Bruises Change Colors as They Heal?
It's super weird that a bruise changes from deep purple to green to yellow during the healing process. HowStuffWorks looks into this strange process.
What Did Your Address Look Like 250 Million Years Ago?
The Ancient Earth visualization map shows the movement of the planet's tectonic plates in a really cool way.
Why Do People Knock on Wood for Luck?
people.howstuffworks.com/why-do-people-knock-on-wood-for-luck.htm
Have you ever wondered why people knock on wood for luck? Like many superstitions, the answer goes back as far as pagan rituals.
What If You Ate Uranium?
science.howstuffworks.com/science-vs-myth/what-if/what-if-ate-uranium.htm
You would probably be pretty freaked out if you ate uranium, right? Well, if you've ever eaten a potato or turnip, you may already have done so. How does your body deal with this radioactive substance?
Dog Chastity Belts: The Unusual Alternative to Spaying and Neutering
animals.howstuffworks.com/pets/dog-chastity-belt.htm
If you want to prevent a "whoopsie" litter of puppies but you're not quite ready to spay or neuter your dog, try a dog chastity belt. A no, we're not kidding.
The Ultimate Fighting Championship Quiz
play.howstuffworks.com/quiz/ultimate-fighting-championship-quiz
These mixed martial arts fighters pummel each other into submission for fans worldwide. How much do you know about the UFC? Fight through this quiz to find out.
The Cotton Gin: Eli Whitney and the Impact on the U.S. Economy
science.howstuffworks.com/innovation/inventions/cotton-gin.htm
Explore the ingenuity of Eli Whitney's cotton gin, a machine that transformed cotton processing, reshaped industries and influenced economies.
Why Don't All Food Cans Have Pull Tabs?
money.howstuffworks.com/food-cans-pull-tabs.htm
You can open a can with a can opener, but a can with a pull tab is even easier to open. So, why don't more cans come with pull tabs?
15 Black Gemstones for Not-so-inner Goth Vibes
science.howstuffworks.com/environmental/earth/geology/black-gemstones.htm
Some gems dazzle with rainbow brilliance. Others whisper their power in deep, dark silence. Black gemstones aren't flashy, but they hold serious weight in style, symbolism and geology.
How Brake Relining Works
auto.howstuffworks.com/auto-parts/brakes/brake-repair/brake-relining.htm
Brake relining isn't as difficult as you might think. Learn all about brake relining at HowStuffWorks.