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How do you build an underwater tunnel?
science.howstuffworks.com/engineering/structural/build-underwater-tunnel.htm
Underwater tunnels are so commonplace that we rarely think of the great dangers -- and extreme construction techniques -- these modern wonders require. With the opening of the Marmaray Tunnel in October 2013, it's time to take a second look.
How 4D Printing Works
science.howstuffworks.com/4d-printing.htm
Is 4D printing much different from 3-D printing? What if we told you some tech insiders are betting it has the potential to change industries from fashion to health care to defense?
How Animal Testing Works
science.howstuffworks.com/innovation/scientific-experiments/animal-testing.htm
Animal testing has a long, gruesome history, but it's also saved countless human lives.
10 Reasons College Costs So Much
People often complain about the high price of college today. Here are 10 reasons why college costs so much from HowStuffWorks.
10 Real Animals That Seem Make-believe
animals.howstuffworks.com/animal-facts/10-animals-seem-make-believe.htm
The world boasts an incredible diversity of animals, some of which are so colorful and bizarre they seem made-up. Meet 10 of them at HowStuffWorks.
10 Fake Scarcities
science.howstuffworks.com/science-vs-myth/everyday-myths/fake-scarcities.htm
What are 10 scarcities that are not really scarcities? Learn more about fake scarcities at HowStuffWorks.
10 of History's Most Notorious Traitors
history.howstuffworks.com/historical-figures/10-history-notorious-traitors.htm
Can you name 10 of history's most notorious traitors? Find out 10 of history's most notorious traitors at HowStuffWorks.
How the RIAA Works
entertainment.howstuffworks.com/riaa.htm
The Recording Industry Association of America's goal is to promote and protect the music industry. Learn about the RIAA in this article.
10 Surprising Behaviors in Nonhuman Animals
animals.howstuffworks.com/animal-facts/10-behaviors-in-nonhuman-animals.htm
Nonhuman animals display some strange and surprising behaviors. Learn about 10 surprising behaviors observed in nonhuman animals.
How Executive Orders Work
people.howstuffworks.com/executive-order.htm
Executive orders are directives from the president without input from the legislative or judiciary branches of government. HowStuffWorks explains.