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How Tattoos Work
health.howstuffworks.com/skin-care/beauty/skin-and-lifestyle/tattoo.htm
Tattoos decorate the body with ink injected into the skin. Learn about creating tattoos, from sterilizing tattoo equipment to finding a tattoo parlor.
How the Amphicar Worked
auto.howstuffworks.com/1961-1968-Amphicar.htm
The 1961-1968 Amphicar was an amphibious car introduced at the 1959 Geneva Salon. Read about this fun and famous collectible invented by Hans Trippel.
8 Things Invented or Discovered by Accident
From cornflakes to Silly Putty, many of the things we consume today were created unintentionally. Here are the stories behind eight well-known inventions.
How Police Robots Work
science.howstuffworks.com/police-robot.htm
Police robots will soon be roaming the streets thanks to developments in technology. Learn about police robots and the new police robot R Bot 001.
How Differentials Work
auto.howstuffworks.com/differential.htm
Differentials let cars make turns with ease. Find out how the differential allows the wheels to rotate at different speeds.
How Acid Rain Works
science.howstuffworks.com/nature/climate-weather/atmospheric/acid-rain.htm
Acid rain is caused by emissions of sulfur dioxide and nitrogen oxides from power plants, cars and factories. Find out how acid rain is produced.
How Political Conventions Work
people.howstuffworks.com/political-convention.htm
In an election year, political conventions take over the U.S. media for days, with political-party platforms and propaganda. But what real purpose do the conventions serve?
How Military Robots Work
science.howstuffworks.com/military-robot.htm
Soldiers face danger every day -- detecting landmines, deactivating unexploded bombs and scoping out hostile buildings are tasks that don't always require a human presence. That's where military robots come in.
How Spontaneous Human Combustion Works
science.howstuffworks.com/science-vs-myth/unexplained-phenomena/shc.htm
Ever heard of a person going up in flames for no reason at all? Find out what spontaneous human combustion means.
10 Extreme Coupon Tips for Normal People
money.howstuffworks.com/personal-finance/budgeting/5-extreme-coupon-tips-for-normal-people.htm
Extreme couponing might not be for everyone, but these tips can still help keep your bank account healthy. Check out 10 extreme coupon tips for normal people.