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How Dark Matter Works
science.howstuffworks.com/dictionary/astronomy-terms/dark-matter.htm
For decades, stargazing scientists have been facing their own darkness on the edge of town as they try to explain one of astronomy's greatest mysteries: dark matter. Have they been successful, or will the universe carry its secrets for a long time?
Dental Implant Procedure
health.howstuffworks.com/wellness/oral-care/procedures/dental-implant.htm
A dental implant procedure inserts a metal rod into a tooth root so that fake teeth can be added to the mouth. Learn what's all involved in a dental implant.
How Lithium-ion Batteries Work
electronics.howstuffworks.com/everyday-tech/lithium-ion-battery.htm
Lithium-ion batteries are incredibly popular these days. You can find them in laptops, PDAs, cell phones and iPods. Find out why.
How do they measure sea level?
science.howstuffworks.com/environmental/earth/oceanography/question356.htm
How do they measure "sea level"? Is it the average of the tides? And is the sea level actually rising or not?
Can a penny dropped off a building kill you?
science.howstuffworks.com/science-vs-myth/everyday-myths/can-penny-dropped-off-building-kill.htm
Walking down a city sidewalk, you protect your valuables and weave through crowds. Should you also beware of falling pennies?
How important is film speed?
electronics.howstuffworks.com/cameras-photography/tips/how-important-is-film-speed.htm
How important is film speed? Visit HowStuffWorks to learn how important film speed is.
Why the Inside of a Tornado Gets Super Cold, Leaves You Gasping for Air
science.howstuffworks.com/nature/natural-disasters/cold-thin-air-inside-tornado-vortex.htm
Researchers from Montreal's Concordia University have figured out why the air inside a tornado vortex is cooler and less dense than the surrounding air.
How Submarines Work
science.howstuffworks.com/transport/engines-equipment/submarine.htm
Not so long ago, the world's naval forces worked entirely above water. But all that changed with the addition of the submarine to the standard naval arsenal.
Amazing Animals: Shark Quiz
play.howstuffworks.com/quiz/shark-quiz
They are notoriously savage and bloody when they attack, but behind a sharks' vicious reputation is a variety of different shapes, sizes and demeanors. Learn all about the different types of sharks.
What's the Hardest Wood in the World?
science.howstuffworks.com/hardest-wood-in-the-world.htm
You might think oak or hickory is tough, but when it comes to the hardest wood in the world, they don’t even come close.