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How Nitrous Oxide Works
science.howstuffworks.com/nitrous-oxide.htm
At the same time scientists discovered that nitrous oxide could numb agonizing pain, they also found it could make you really lightheaded and silly. Yes, huffing parties started in the 1700s.
What if I forgot to remove a piercing before an MRI?
science.howstuffworks.com/remove-piercing-before-mri.htm
The magnets found in an MRI machine are incredibly powerful. It can pull a stethoscope right out of a doctor's lab coat. So what would happen if you forgot to take out an earring? Ouch!
Can You Identify the Tree From Its Bark?
play.howstuffworks.com/quiz/can-you-identify-the-tree-its-bark
From busy cities to lush jungles, from tall mountains to blistering deserts, trees can be found everywhere. Get ready to put your knowledge of trees to the ultimate test with this tree bark quiz!
7 Secret Caves We'd Love to See Inside
science.howstuffworks.com/environmental/earth/geology/secret-caves.htm
There are caves all over the world, but some are in places that are hard to explore - hidden by rocks, ruins or even under ice. We've found seven secret caves you probably never knew existed.
Earth's Oldest Color Was Pink
science.howstuffworks.com/life/cellular-microscopic/earths-oldest-color-was-pink.htm
Scientists have found that ancient fossilized chlorophyll was dark red and purple in its concentrated form, which means that when diluted by water or soil, it would have lent a pink cast to earth and sea.
Why Do Sheepshead Fish Have 'Human' Teeth?
animals.howstuffworks.com/fish/sheepshead-fish.htm
The sheepshead fish is a curiosity to anglers and marine biologists alike. This unique species, found along the Atlantic coast of North America, has long received attention for its strange dental structure, resembling that of humans.
Food For Plants: Kitchen Scraps That Instantly Fertilizer Without Composting
home.howstuffworks.com/green-living/fertilize-plants-kitchen-scraps.htm
Indoor and outdoor plants will thrive with these natural, soil-boosting fertilizers commonly found in the garbage cans of compost-free homes. Learn more about instantly fertilize plants wth these three kitchen scraps.
Nearly 1,000 U.S. Streets Named After MLK Jr. What Are They Like?
people.howstuffworks.com/government/local-politics/streets-named-after-mlk.htm
Researchers investigated the racial makeup and economic well-being of 22,286 census blocks in the U.S. with roadways bearing Dr. Martin Luther King Jr.'s name. Here's what they found.
How the Snow Leopard Survives Harsh, Frigid Temperatures
animals.howstuffworks.com/mammals/snow-leopard.htm
Often called the "ghosts of the mountains," the elusive snow leopard is one of the most mysterious big cats. Found in the rugged mountain ranges of Central Asia, these beautiful animals are perfectly adapted to their harsh, cold environments.
The Science Behind Why We All Have Snot
health.howstuffworks.com/human-body/systems/respiratory/mucus.htm
Believe it or snot, almost every living creature has some kind of mucus - because mucus does so many things. A study found mucus was so beneficial to mammals, it evolved independently in species.