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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 Carbon-neutral E-fuels Work
auto.howstuffworks.com/fuel-efficiency/alternative-fuels/carbon-neutral-e-fuel.htm
Do you know How Carbon-neutral E-fuels Work? Keep reading to learn about zero-emission vehicles and discover how carbon-neutral e-fuels work.
10 Disadvantages of Biofuels
auto.howstuffworks.com/fuel-efficiency/biofuels/10-disadvantages-of-biofuels.htm
Biofuels are hot now, but integrating them into our fuel use habits could be costly. Read more about 10 disadvantages of biofuels.
1981 Baseball Season
entertainment.howstuffworks.com/1981-baseball-season.htm
Much to the dismay of baseball fans, the 1981 baseball season is best remembered for the ten-week players' strike that canceled 713 games and ushered in the unpopular split-season format. Learn more about the 1981 baseball season.
Hair Replacement Guide
health.howstuffworks.com/skin-care/hair-care/scalp-treatments/hair-replacement.htm
Hair replacement is one solution for millions of men and women around the globe are affected by thinning hair. Learn hair replacement options.
How Hydraulic Cranes Work
science.howstuffworks.com/transport/engines-equipment/hydraulic-crane.htm
Hydraulic cranes perform seemingly impossible tasks, lifting 70-ton objects with absolute ease. See the simple design behind the Herculean results.
How Stinger Missiles Work
science.howstuffworks.com/stinger.htm
The Stinger missile is a deadly man-portable air-defense system (MANPADS) that can be rapidly deployed by ground troops. It's lightweight, combat-proven and has a greater than 90 percent success rate. So how are Stingers used and against whom?
How Dimmer Switches Work
home.howstuffworks.com/dimmer-switch.htm
A regular light switch takes care of off and on. A dimmer switch handles off, on and everything in between. Find out what this clever switch does with electrical current.
How Car Computers Work
auto.howstuffworks.com/under-the-hood/trends-innovations/car-computer.htm
Cars seem to get more complicated with each passing year. Today's cars might have as many as 50 microprocessors on them. Essentially, you're driving around in a giant computer. Learn all about it.
Sperm Banks
health.howstuffworks.com/pregnancy-and-parenting/pregnancy/fertility/sperm-bank.htm
Sperm banks use sperm donors to gather or preserve sperm. Learn how a sperm bank stores sperm and screens donors.