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How Stirling Engines Work
auto.howstuffworks.com/stirling-engine.htm
The Stirling engine is a heat engine that is vastly different from the internal-combustion engine in your car. It has the potential to be more efficient than most types of engines, but it hasn't made it into mass production yet. Find out why.
How Geothermal Energy Works
science.howstuffworks.com/environmental/energy/geothermal-energy.htm
Geothermal energy is clean, abundant and renewable. Learn about geothermal energy, geothermal heat pumps and geothermal power plants.
How Street Sweepers Work
auto.howstuffworks.com/street-sweeper.htm
Street sweepers have been around for more than a century keeping our roads clean. Learn the history of street sweepers and what they're like today.
How to Find Out If You Have a Warrant
money.howstuffworks.com/how-to-find-out-if-you-have-warrant.htm
Do you know how to find out if the court has a warrant out for your arrest? HowStuffWorks explains all you need to know if you have a warrant.
5 Low-cost Biofuels
auto.howstuffworks.com/fuel-efficiency/biofuels/5-low-cost-biofuels.htm
Every fuel has a monetary and ecological cost, but some are more affordable than others. Read on to find out more about five low-cost biofuels.
What Are the Biggest Lakes in the U.S.?
science.howstuffworks.com/environmental/earth/biggest-lakes-in-the-us.htm
The United States is home to some truly spectacular lakes. Whether considering the massive Great Lakes themselves or deep alpine gems like Lake Tahoe, with its crystal-clear waters, America is well-stocked with many sizable bodies of water.
How a Teenage Sacagawea Guided the Lewis and Clark Expedition Into Immortality
history.howstuffworks.com/historical-figures/sacagawea.htm
Sacagawea, at around 16 or 17, guided the Lewis and Clark expedition thousands of miles from North Dakota to the Pacific Ocean, and became a legend.
The America Quiz
play.howstuffworks.com/quiz/the-america-quiz
Land of the free and home of the brave, yes, that is the United States of America! But just how much do you really know about the USA?
6 Startling Revelations From Declassified U.S. Government Documents
people.howstuffworks.com/declassified-us-government-documents.htm
Declassified government documents can change our view of history, and also sometimes contain surprising revelations. Here are six to discover.
How the Ritchie Boys, Secret Refugee Infiltrators, Took on the Nazis
history.howstuffworks.com/world-war-ii/ritchie-boys.htm
The Ritchie Boys, many of them Jewish refugees, trained in the U.S. and returned to Europe to help defeat Hitler and the Nazis.