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Your search for "occur" returned 4,013 results
Why Won't My Eye Stop Twitching?
health.howstuffworks.com/human-body/systems/eye/why-wont-my-eye-stop-twitching.htm
The eye twitching that's driving you crazy - it can be caused by lots of things. HowStuffWorks looks at them; don't worry, most are harmless.
How Pollen Works
science.howstuffworks.com/life/botany/pollen.htm
Pollen grains are, in essence, plant sperm. But how do the grains get where they need to go, and what's the advantage of trusting your genetic future to the winds?
Do You Know What These Police Codes Mean?
play.howstuffworks.com/quiz/do-you-know-what-these-police-codes-mean
It's not 10-18, but this quiz will keep you 10-6! We'll 10-12 until you're 10-24. Any idea what we just said? Decode this message after you work your way through this collection of police codes you might hear over the scanner.
Can You Match the Image to the Skin Condition?
play.howstuffworks.com/quiz/can-you-match-the-image-to-the-skin-condition
Ever get a red, itchy spot on your skin and wonder what caused it? A rash? A spider bite? Ringworm? There are dozens upon dozens of skin conditions out there, so how many do you know? Scratch the itch with this quiz!
12 Deadly Diseases Cured in the 20th Century
health.howstuffworks.com/diseases-conditions/rare/12-deadly-diseases-cured-in-the-20th-century.htm
Diseases like polio and smallpox took countless lives before a cure was found. Read our list of 12 diseases that were cured in the 20th century.
How to Prevent Sexually Transmitted Diseases
health.howstuffworks.com/wellness/preventive-care/how-to-prevent-sexually-transmitted-diseases.htm
Preventing sexually transmitted diseases is simply a matter of being prepared and using your head. Learn how to treat and prevent various STDs.
How Sinkholes Work
science.howstuffworks.com/nature/natural-disasters/sinkhole.htm
Sinkholes are much more than holes in the ground. Learn how sinkholes can cause the Earth to swallow up you, your home and your car.
How Blood Works
health.howstuffworks.com/human-body/systems/circulatory/blood.htm
Blood is the most commonly tested part of the body, and it is truly the river of life. Learn about red and white blood cells, lymphocytes, blood tests, blood types and blood donation.
How Mirages Work
science.howstuffworks.com/mirage.htm
You're driving down the road on a sunny day, and you see a puddle of water coming up. You look again and it's gone! What happened? You'll be able to answer that question if you read our miraculous mirage article.
What Causes Stockholm Syndrome?
health.howstuffworks.com/mental-health/mental-disorders/stockholm-syndrome.htm
Stockholm syndrome is a phenomenon in which victims of trauma or kidnapping sympathize with their captors. Learn how Stockholm Syndrome got its name.