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What are self-tapping machine screws?
home.howstuffworks.com/self-tapping-machine-screws.htm
Screws are differentiated by many characteristics, including how and where they're used. Learn what self-tapping machine screws are in this article.
How Fast Food Works
science.howstuffworks.com/innovation/edible-innovations/fast-food.htm
Unless you're in a particularly remote area, you can't go far in most developed countries without finding a fast-food restaurant. Learn how fast-food restaurants came to be and why they're so popular.
Who killed JFK?
history.howstuffworks.com/history-vs-myth/who-killed-jfk.htm
Who killed JFK? Conspiracy theories about the JFK assassination still abound. Learn about the JFK theories and who killed John F. Kennedy.
Europe After World War I: November 1918-August 1931
history.howstuffworks.com/historical-events/europe-after-world-war-1.htm
World War I, also known as the Great War, left Germany and other countries humiliated and angry. Learn about events that led to World War II.
How Knights Work
history.howstuffworks.com/historical-figures/knight.htm
Knights were medieval warriors that were highly trained from a young age. Learn about knights and the process of training to become a medieval knight.
How Currency Works
money.howstuffworks.com/currency.htm
Currency is a complex aspect of human civilization. Find out all about these symbols of financial value.
How Spotify Works
electronics.howstuffworks.com/gadgets/audio-music/spotify.htm
Spotify, the Swedish music streaming service that's been hot in Europe for years, is now making waves in the United States. See what Spotify is all about.
What Did Isaac Newton Discover? 10 of Sir Isaac Newton's Inventions
science.howstuffworks.com/innovation/famous-inventors/5-isaac-newton-inventions.htm
Almost 300 years after his death, Sir Isaac Newton remains one of the most influential thinkers in history. What are some of his most enduring inventions?
How the Freedom of Information Act Works
people.howstuffworks.com/freedom-information-act.htm
The Freedom of Information Act gives citizens access to government materials, but not every document is made public. Learn more at HowStuffWorks.
How do sodium-acetate heat pads work?
home.howstuffworks.com/question290.htm
Heating pads are made of a plastic pouch and a clear liquid. Inside the pouch is a metal disk that when clicked crystallizes the liquid causing it to heat up. Find out how heat pads work.