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How Tunnels Work

Constructing a tunnel is one of the most complex challenges in the field of civil engineering. Learn about the basics behind tunnels.

How Wind Tunnels Work

Wind tunnels are the unsung heroes of aerodynamics, leading to safer planes, cars and space vehicles. Learn how wind tunnels work.

How do you build an underwater tunnel?

Underwater tunnels, like the Marmaray, rely on some extreme construction techniques. Learn more about underwater tunnels at HowStuffWorks.

World's Largest Ship Tunnel Will Go Straight Through Norwegian Mountain

Will the Stad Ship Tunnel ever become a reality? Learn more about shipping and engineering in this HowStuffWorks article.

Why are the insides of tunnels usually covered in ceramic tile?

I've noticed that the insides of road and subway tunnels are usually covered in ceramic tile. Is there any particular reason for this or is it simply convention?

What would happen if I drilled a tunnel through the center of the Earth and jumped into it?

Let's say that it were possible to bore a tunnel from one side of Earth, through the center and out the other side. If you were to jump into the tunnel on one side of the planet, what would happen?

Is there a secret city under Walt Disney World?

Urban legends about Disney World abound. Find out whether there's a secret city under Walt Disney World at HowStuffWorks.

Are underpasses safe during a tornado?

Underpasses may seem like adequate shelter, but think again. Learn if underpasses are really safe during tornadoes at HowStuffWorks.

How was the Bay Bridge built?

How was the Bay Bridge built? Learn about the engineering behind the Bay Bridge at HowStuffWorks.

Massive Lunar Lava Tubes Could Become Home for Moon Colonists

Could lunar colonists live inside the moon? Learn more about lava tubes on the moon in this HowStuffWorks Now article.

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