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The Mystique of the Lucky Horseshoe: History and Beliefs
people.howstuffworks.com/horseshoes-lucky.htm
Lucky horseshoes are meant to bring good fortune. But which way are you supposed to hang it, and why are there seven holes in a horseshoe? Read on to find out.
Hagfish: This Eel-like Slime Machine Is a Predator's Nightmare
animals.howstuffworks.com/fish/hagfish.htm
The elusive hagfish is a master at hiding in holes and crevices, but its main defense is its ability to release a noxious, suffocating and sometimes poisonous slime when attacked.
What kind of drill bit do I need for ceramic tile?
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Drilling holes in ceramic tiles can be tricky, and the tile can easily shatter. Learn what kind of drill bit you need for ceramic tiles in this article.
What Kind of Drill Bits Do I Need for Brick or Concrete?
home.howstuffworks.com/drill-bit-brick-concrete.htm
Putting up shelves or pictures might require boring holes into brick or concrete. Learn what kind of drill bits you need for brick or concrete in this article.
Gravitational Waves! Or the Chirps That Prove Einstein Was Right
We've observed gravitational waves, thanks to two black holes colliding and two interferometers. Learn about gravitational waves at HowStuffWorks Now.
What are self-tapping screws?
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Self-tapping screws drill their own holes when they are screwed into materials such as wood, metal and plastic. Learn more about self-tapping screws from this article.
How do you use self-tapping screws for aluminum?
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Self tapping screws fasten materials together tightly without the need for a pre-drilled hole. Learn how to use self-tapping screws for aluminum in this article.
How a Panic Room Works
home.howstuffworks.com/home-improvement/household-safety/panic-room.htm
A panic room is a safe room that people can hole up in the event of an emergency. Read about panic rooms and learn about the technology installed in panic rooms.
How Does a Camera Obscura Device Work?
electronics.howstuffworks.com/question131.htm
A pinhole camera is the simplest camera possible. To get a better understanding of how they work, read more about camera obscura principles.
How Power Drills Work
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Whether you're drilling holes or screwing screws, power drills make finishing most home improvement jobs much faster. Learn all about power drills.