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What causes the sound of a heartbeat?
health.howstuffworks.com/human-body/systems/circulatory/sound-of-heartbeat.htm
We're all familiar with the sound of a heartbeat: lub-dub, lub-dub. Learn what causes the sound of a heartbeat and why yours might sound different.
Why could China's Three Gorges Dam cause an environmental disaster?
science.howstuffworks.com/environmental/green-science/three-gorges-dam-disaster.htm
The Three Gorges Dam could very well lead to an environmental disaster for China. Learn about the Three Gorges Dam.
How Towing Weight Distribution Systems Work
auto.howstuffworks.com/auto-parts/towing/equipment/hitches/towing-weight-distribution-systems.htm
Towing weight distribution systems make towing a lot safer. Learn all about towing weight distribution systems at HowStuffWorks.
How Bluetooth Surveillance Works
electronics.howstuffworks.com/bluetooth-surveillance.htm
Bluetooth surveillance uses the popular wireless technology found in mobile devices to track people's movements. Learn about Bluetooth surveillance.
How Ballpoint Pens Work
home.howstuffworks.com/pen.htm
Before the handy ballpoint, getting a few sentences onto paper was a pretty involved task. Find out how the ballpoint pen stores and manages its own ink supply to make writing a snap.
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.
1955 Lancia Florida
auto.howstuffworks.com/1955-lancia-florida.htm
Created in Italy, the 1955 Lancia Florida was a completely new kind of car. See pictures and learn about the Florida's design and lasting impact.
Camping Safety Tips for Kids
lifestyle.howstuffworks.com/crafts/seasonal/camping-safety-tips-for-kids.htm
These camping safety tips for kids teach vital skills to have while hiking in the wilderness. Learn more about camping safety tips for kids.
1931-1945 Volkswagen Beetle
auto.howstuffworks.com/1931-1945-volkswagen-beetle.htm
The 1931-1945 Volkswagen Beetle was designed as a small, affordable car for the masses. See pictures and learn about the 1931-1945 Volkswagen Beetle.
1920 Baseball Season
entertainment.howstuffworks.com/1920-baseball-season.htm
Learn about the 1920 baseball season, when Cleveland won the World Series, Babe Ruth broke more records, and Ray Chapman was killed by a pitch.