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What Is the Difference Between Two- and Three-pronged Plugs?
electronics.howstuffworks.com/everyday-tech/question110.htm
Some appliances use three prongs to connect to an outlet, while others only use two. Learn the difference between two- and three-pronged plugs.
Why Humans Scream, Make Crazy Faces When Terrified
science.howstuffworks.com/life/inside-the-mind/human-brain/why-humans-scream-when-scared.htm
Wouldn't keeping quiet help us get away from whatever's scaring us? What's the science behind the weird face and raw shout?
Can We Guess Your Underwear Preference?
play.howstuffworks.com/quiz/can-we-guess-your-underwear-preference
For us women, there's nothing better than having options, but one will always be our favorite. Let us guess your favorite underwear in this quiz.
Keeping a Garden Log
home.howstuffworks.com/gardening/garden-design/keeping-a-garden-log.htm
Keeping a garden log is a little used but helpful tool in maintaining your garden. Learn what to note down and how to use it at HowStuffWorks.
How the Census Works
people.howstuffworks.com/census.htm
The U.S. census is a huge project bent on counting every U.S. resident. Find out about the changes for the 2020 census with HowStuffWorks.
How Napalm Works
science.howstuffworks.com/napalm.htm
Napalm is a fiery tactical weapon that can stick to targets like no other incendiary weapon. Learn how napalm is used in war and who has used it.
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The MOAB Bomb: A Massive Force, But No Match for Nukes
science.howstuffworks.com/the-mother-all-bombs-is-big-its-no-nuke.htm
The MOAB is the largest nonnuclear bomb ever used by the U.S. So what makes it OK to drop this bomb and not a nuclear warhead? We dive in to find out.
How Nuclear Medicine Works
science.howstuffworks.com/nuclear-medicine.htm
Nuclear materials get used in many forms of nuclear medicine -- everything from PET scans to chemotherapy uses them. Learn how nuclear medicine works.
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?