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How Fear Works
science.howstuffworks.com/life/inside-the-mind/emotions/fear.htm
Fear is the brain's reaction to a stimulus where chemicals are released that raise the heart rate. Learn about fear and the different fear responses.
How Fingerprinting Works
science.howstuffworks.com/fingerprinting.htm
Fingerprinting is a popular technique for identifying criminals and authenticating access. Learn about fingerprinting and its storied history.
How Fire Engines Work
science.howstuffworks.com/transport/engines-equipment/fire-engine.htm
We see them all the time, but do you ever think about everything these machines do? A fire engine is a combination personnel carrier, tool box and water tanker. Learn all about this amazing 3-in-1 machine.
How Fire Tornadoes Work
science.howstuffworks.com/nature/natural-disasters/fire-tornado.htm
Inject heat, ash and fire into a spinning mass of air. Watch as a funnel of flames leaps from the ground, reaches for the heavens and then races forward to consume everything in its path. Is such a phenomenon possible?
How Fire Works
science.howstuffworks.com/environmental/earth/geophysics/fire.htm
Few things have done as much harm to humanity as fire, and few things have done as much good. Find out where fire comes from and see why it behaves the way it does. The answers might surprise you!
How Flamethrowers Work
science.howstuffworks.com/flamethrower.htm
When humans discovered fire, they learned to cook their food in a controlled environment. What came next? Flamethrowers, of course. What do flamethrowers have in common with their living counterpart -- fire breathers?
How Flintlock Guns Work
science.howstuffworks.com/flintlock.htm
Flintlock guns were extremely important weapons in the American Revolution; they also formed the foundation of all modern guns. Learn about the gun that started it all.
How Floating Bridges Work
science.howstuffworks.com/engineering/structural/floating-bridge.htm
Bridges span the gap and help us get from point A to B, but who knew they could float, too? Find out what the deal is with floating bridges in this article.
How Floating Cities Will Work
science.howstuffworks.com/engineering/structural/floating-city.htm
Floating cities could potentially house over 50,000 permanent residents in the sky! Learn about floating cities in this article.
How Food Cravings Work
science.howstuffworks.com/innovation/edible-innovations/food-craving.htm
As you surf the Web, your mind is distracted by the thought of warm cookies floating in cold milk. Will this craving ever subside, or do you need chocolaty satisfaction ASAP?