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Can You Handle The Tooth? 10 Things You Didn't Know About Teeth

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The average adult has 28 to 32 teeth, depending on their "wise" set of third molars or lack thereof. But besides the importance of brushing and flossing, how well do you know your chompers? From LED braces to pearly whites in hard-to-reach places, we bring you the tooth, the whole tooth, and nothing but the tooth.

1. Some babies are born with teeth.

About one in every 2000 babies is born with natal teeth, so sometimes baby's first dentist appointment is only a few days after birth. Natal teeth usually grow on the bottom gums and tend to have weak roots; they're often removed to prevent problems with breastfeeding and accidental swallowing. Being born with teeth can be a symptom of certain medical conditions, and ancient physiognomy associated it with evil—but it's usually harmless. Advice columnist twin sisters Ann Landers and Abigail Van Buren were both born with teeth. So were Napoleon and Julius Caesar. 

2. Not everyone loses their baby teeth.

Losing baby teeth is a rite of passage, not to mention a small source of income for most kids. By age 3, the average child has a full set of 20 temporary teeth. These little chiclets loosen and eventually fall out as the permanent teeth below start to erupt. Children typically start losing teeth around 5 or 6 and finish in their early teens. But if a person doesn't have a replacement permanent tooth, that baby tooth will stay put.

3. And some people can't stop losing teeth!

Mo' molars, mo' problems? Depends who you ask. People with hyperdontia have extra, or super-numerary, teeth. Most of these teeth remain hidden below the gumline, but occasionally they'll erupt and crowd other teeth. If extra teeth crash a mouth party, a dentist can remove them, or an orthodontist can make bank straightening all of them out. Very rarely, a person will lose a "permanent" set of teeth at an older age, only to have a no-for-real-now set grow back in. The rest of us have to get dentures.

4. And you might as well do something with those teeth, right?


Image via Scrap&Smith's Etsy Store

What exactly is the Tooth Fairy supposed to do with the teeth she collects? If she's crafty, she might want to look into selling human tooth art on Etsy. Yep, there's apparently a small—and more than a little creepy—demand for artsy molars and incisors. Exhibit A: These double rings made of molars. Exhibit B: This quirky pendant that, dare we say, looks really cute. But these molar cuff links? Designer imposters. Even actress Scarlett Johansson made a golden necklace out of one of her extracted wisdom teeth and gave it to her ex-husband Ryan Reynolds. Do you think she got it back after they split?

5. Tumors can grow teeth, too.

No one wants to deal with an abnormal growth, but teratomas are especially icky. The germ cell tumors can contain several types of tissues and are usually found in the ovaries, testes, and near the tailbone. Some of them even contain teeth. And hair. And occasionally eyes, hands, and other limbs! Fortunately, many teratomas are benign and can be surgically removed. If you've got one, here's hoping the Tooth Fairy sends you a get well card.

6. But a tooth in your eye doesn't have to be a bad thing.

Ever hear the expression "I'd give my eye-teeth"? One woman literally gave her eye a tooth to restore her vision. In 2000, Sharon Thornton lost her vision to Stevens-Johnson syndrome, a condition that destroys the cells on the eye’s surface. Nine years later, the 60-year-old woman elected to try an unusual surgery. One of her canines was removed, so her cheek and dental tissue could be implanted in her left eye, replacing the damaged cornea. Within a day, the blind woman had regained 20/70 vision and the hope of improved sight in the future.

7. Braces are cooler than ever before.

Back in ye olde days of orthodontia, the most creative thing the metal-mouthed could do with their braces was choose rubber band color. Today's options include Invisalign or lingual braces hidden along the inside of your teeth. Or you can modernize traditional braces with glow-in-the-dark or LED technology. In the former option, fluorescent rubber bands or brackets glow when light-activated. (Orthodontists suggest shining a flashlight on the braces for a quick demonstration.) The Japanese clothing store Laforet Harajuku invented LED braces for a January 2011 ad campaign. Switched on by smiling wide, these multicolored flashing lights don't actually straighten teeth. They will, however, make you the coolest kid at a rave.

8. But not all cultures consider straight teeth the beauty ideal.

Straight white teeth might seem universally appealing, but one country's snaggletooth is another country's sex appeal. (How do you think Austin Powers got so much action?) In Japan, crooked teeth called yaeba are so coveted that some women with perfect teeth get crooked veneers to enhance their smiles. They figure that crowded chompers make them look younger and more adorable, which makes sense. American parents could save lots of money if the trend catches on here...

9. Humans will evolve past wisdom teeth.

A third set of molars helped our larger-jawed ancestors grind up roots, nuts, and leaves. But nowadays, 35% of people are born without wisdom teeth. Most of the rest of us are encouraged to get ours removed—our mouths are too small; our dentistry to pricey to screw up. When our bodies no longer need an organ or part, it becomes vestigial and eventually disappears. According to scientists, future generations will lack appendices, wisdom teeth, and maybe even little toes.

10. Candy's better for your teeth than raisins.


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Halloween's coming up, so pay attention: Not all sweets are equally bad for your teeth. In fact, you might be surprised which treats are more likely to cause cavities. Sugar from all the foods we eat feeds bacteria that create acid and erode tooth enamel. With enough erosion over time, a tooth becomes the Grand Cavity Canyon. So how do you have your snacks and keep the teeth to eat them, too? Ditch foods that get stuck in your teeth (breads, chips, and fruit snacks) for those that dissolve quickly (chocolate, caramels, and jelly beans). It's also better to snack all at once than to munch and feed bacteria throughout the day. Happy trick or treating!

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Mysterious 'Hypatia Stone' Is Like Nothing Else in Our Solar System
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In 1996, Egyptian geologist Aly Barakat discovered a tiny, one-ounce stone in the eastern Sahara. Ever since, scientists have been trying to figure out where exactly the mysterious pebble originated. As Popular Mechanics reports, it probably wasn't anywhere near Earth. A new study in Geochimica et Cosmochimica Acta finds that the micro-compounds in the rock don't match anything we've ever found in our solar system.

Scientists have known for several years that the fragment, known as the Hypatia stone, was extraterrestrial in origin. But this new study finds that it's even weirder than we thought. Led by University of Johannesburg geologists, the research team performed mineral analyses on the microdiamond-studded rock that showed that it is made of matter that predates the existence of our Sun or any of the planets in the solar system. And, its chemical composition doesn't resemble anything we've found on Earth or in comets or meteorites we have studied.

Lead researcher Jan Kramers told Popular Mechanics that the rock was likely created in the early solar nebula, a giant cloud of homogenous interstellar dust from which the Sun and its planets formed. While some of the basic materials in the pebble are found on Earth—carbon, aluminum, iron, silicon—they exist in wildly different ratios than materials we've seen before. Researchers believe the rock's microscopic diamonds were created by the shock of the impact with Earth's atmosphere or crust.

"When Hypatia was first found to be extraterrestrial, it was a sensation, but these latest results are opening up even bigger questions about its origins," as study co-author Marco Andreoli said in a press release.

The study suggests the early solar nebula may not have been as homogenous as we thought. "If Hypatia itself is not presolar, [some of its chemical] features indicate that the solar nebula wasn't the same kind of dust everywhere—which starts tugging at the generally accepted view of the formation of our solar system," Kramer said.

The researchers plan to further probe the rock's origins, hopefully solving some of the puzzles this study has presented.

[h/t Popular Mechanics]

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Ocean Waves Are Powerful Enough to Toss Enormous Boulders Onto Land, Study Finds
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During the winter of 2013-2014, the UK and Ireland were buffeted by a number of unusually powerful storms, causing widespread floods, landslides, and coastal evacuations. But the impact of the storm season stretched far beyond its effect on urban areas, as a new study in Earth-Science Reviews details. As we spotted on Boing Boing, geoscientists from Williams College in Massachusetts found that the storms had an enormous influence on the remote, uninhabited coast of western Ireland—one that shows the sheer power of ocean waves in a whole new light.

The rugged terrain of Ireland’s western coast includes gigantic ocean boulders located just off a coastline protected by high, steep cliffs. These massive rocks can weigh hundreds of tons, but a strong-enough wave can dislodge them, hurling them out of the ocean entirely. In some cases, these boulders are now located more than 950 feet inland. Though previous research has hypothesized that it often takes tsunami-strength waves to move such heavy rocks onto land, this study finds that the severe storms of the 2013-2014 season were more than capable.

Studying boulder deposits in Ireland’s County Mayo and County Clare, the Williams College team recorded two massive boulders—one weighing around 680 tons and one weighing about 520 tons—moving significantly during that winter, shifting more than 11 and 13 feet, respectively. That may not sound like a significant distance at first glance, but for some perspective, consider that a blue whale weighs about 150 tons. The larger of these two boulders weighs more than four blue whales.

Smaller boulders (relatively speaking) traveled much farther. The biggest boulder movement they observed was more than 310 feet—for a boulder that weighed more than 44 tons.

These boulder deposits "represent the inland transfer of extraordinary wave energies," the researchers write. "[Because they] record the highest energy coastal processes, they are key elements in trying to model and forecast interactions between waves and coasts." Those models are becoming more important as climate change increases the frequency and severity of storms.

[h/t Boing Boing]

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