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How the Phonograph Revolutionized Sound Recording
science.howstuffworks.com/innovation/inventions/phonograph.htm
The phonograph transformed audio recording, leaving a lasting impact on how we capture and preserve sound. Learn about the invention's history and evolution.
How Escalators Work
science.howstuffworks.com/transport/engines-equipment/escalator.htm
You probably ride escalators all the time, but do you know how they move, and flatten, and keep the handrail in synch with the steps? Find out exactly what is going on inside an escalator.
What Is Resonance?
science.howstuffworks.com/resonance-info.htm
An object free to vibrate tends to do so at a specific rate called the object's natural, or resonant, frequency.
Are electric cars safe in accidents?
auto.howstuffworks.com/are-electric-cars-safe-in-accidents.htm
Cars are dangerous machines. They kill more than 30,000 people per year in the United States alone. Learn more about electric cars safety issues.
How does a pacemaker work?
health.howstuffworks.com/medicine/modern-technology/how-does-a-pacemaker-work.htm
Pacemakers can help someone that suffers from a heart disease. Learn more about pacemakers from Discovery Health.
What conditions are required for life?
science.howstuffworks.com/environmental/earth/geophysics/conditions-required-life.htm
We argue that living well requires wine and cheese, but what does living at all require? You might be surprised to find out that there's no single definition.
Can You Be Allergic to Your City?
If you're moving from one city to another, pack some extra tissues because it's true: Seasonal allergies can flare up when you relocate and are exposed to new allergens.
How to Back Up Your iPhone
electronics.howstuffworks.com/back-up-iphone.htm
You can replace your iPhone easily but what about its contents? That's why it's good to back them up. Here's how.
Can I get AIDS from a mosquito bite?
health.howstuffworks.com/diseases-conditions/infectious/question700.htm
Can I get AIDS from a mosquito bite?
Why are boogers sticky?
health.howstuffworks.com/human-body/systems/nose-throat/question81.htm
My four-year-old asked, "Why are boogers sticky?" I really didn't know what to say...