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How Tsunamis Work

science.howstuffworks.com/nature/natural-disasters/tsunami.htm

Tsunamis are water walls that travel faster than jets. See pictures, footage and diagrams of tsunamis, look at famous tsunamis and learn how tsunamis are born.

How Tuning Forks Work

science.howstuffworks.com/tuning-fork.htm

Pianos lose their tuning, guitars fall out of key -- even church organs need to be tuned every now and then. For centuries, the only sure-fire way to tell if an instrument was in tune was to use a tuning fork.

How Tunnels Work

science.howstuffworks.com/engineering/structural/tunnel.htm

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

How Twinkies Work

science.howstuffworks.com/innovation/edible-innovations/twinkie.htm

Twinkies are an icon of junk-food snacks and guilty pleasures. Learn about Twinkies and find out if a Twinkie can really sit on the shelf for 30 years.

How Twins Work

science.howstuffworks.com/life/genetic/twin.htm

Twins are unique people who are also eerily similar to each other. Do twins really have ESP? Learn how twinning happens and what types of twins are out there.

How Two-stroke Engines Work

science.howstuffworks.com/transport/engines-equipment/two-stroke.htm

A car engine uses a four-stroke cycle -- how can two strokes accomplish the same tasks? Learn all about the two-stroke engine, where it's used and how it compares to a four-stroke.

How Ultrasonic Welding Works

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You probably know that high pitched or high frequency sounds can break materials apart. But did you know that high frequency sounds can be used to bond materials together?

How Ultrasound Works

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Ultrasound lets us peek into the human body to see everything from heart valves to a moving baby. But how do sound waves give us a picture?

How Underground Pet Fences Work

science.howstuffworks.com/innovation/everyday-innovations/pet-fence.htm

Want to keep your dog out of the neighbor's yard but feeling guilty pulling out a leash? You might consider an underground or wireless pet fence. Learn how these fascinating systems work and why this specialized fencing industry is booming.

How Uranium Mining Works

science.howstuffworks.com/uranium-mining.htm

Thanks to our voracious appetite for energy, the element long linked with nuclear weapons is taking on a new role. Where does the hunt begin for uranium?