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How Ultrasound Works
science.howstuffworks.com/ultrasound.htm
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 Flash Memory Works
computer.howstuffworks.com/flash-memory.htm
Flash memory is a compact, flexible type of storage. Learn about types of flash memory, removable flash memory and uses of flash memory.
How Reel Mowers Work
home.howstuffworks.com/reel-mower.htm
Reel mowers rely on human exertion to both move and mow. Learn about the advantages reel mowers hold over gas-powered and rotary lawn mowers.
Are Polar Bears Endangered?
science.howstuffworks.com/environmental/green-science/polar-bear-global-warming.htm
Polar bears and global warming are getting attention from conservationists and the general public. See why polar bears are threatened by global warming.
How can the moon generate electricity?
science.howstuffworks.com/moon-generate-electricity.htm
Moon electricity is generated from the moon's gravitational influence over tides on the Earth's surface. Learn how moon electricity is created from tides.
How Tax Brackets Work
money.howstuffworks.com/personal-finance/personal-income-taxes/tax-brackets.htm
Tax Brackets are ranges of income that are taxed at different rates. Find out which tax bracket you're in and learn the history behind tax brackets.
How Asbestos Works
home.howstuffworks.com/home-improvement/household-safety/asbestos.htm
Asbestos has been around for 3,000 years, but it wasn't until the 1980s that we realized its dangers. Learn more about asbestos.
Baby's Busy Day Quilt Pattern
lifestyle.howstuffworks.com/crafts/quilting/babys-busy-day-quilt-pattern.htm
Keep baby (and mom) happy with this adorable Baby's Busy Day Quilt. Download the free quilt pattern only at HowStuffWorks.
What's so important about the Code of Hammurabi?
history.howstuffworks.com/world-history/code-of-hammurabi.htm
The Code of Hammurabi is an important artifact because it sheds light on laws in Babylonia. Learn why the Code of Hammurabi explains "an eye for an eye."
Empty Nest Syndrome Overview
health.howstuffworks.com/wellness/aging/empty-nest/empty-nest-syndrome.htm
Empty nest syndrome describes the depression that can result for a parent whose children are all out of the house. But is empty nest syndrome a myth?