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How Lie Detectors Work
people.howstuffworks.com/lie-detector.htm
Lie detection is a consistently controversial topic -- how can a machine tell truth from deception? Does everyone have the same physiological reaction when telling a lie? If so, how can some people "beat the box"? Find out what these devices measure and if they really can detect lies.
What Is ESP? How ESP Works
science.howstuffworks.com/science-vs-myth/extrasensory-perceptions/esp.htm
Have you ever had a dream that came true? Or called a friend at the exact moment he was calling you? Most of us have had some sort of paranormal experience. Is this evidence of the existence of ESP?
How Corrective Lenses Work
science.howstuffworks.com/innovation/everyday-innovations/lens.htm
Eyeglasses are one of the most common sights in the world. Learn what goes into creating the lenses and how to read an eyeglass prescription.
How the Vikings Worked
history.howstuffworks.com/historical-figures/viking.htm
The Vikings, we may think, were bloodthirsty pillagers in horned helmets. While Vikings did plunder, they also did great things -- and in different headgear.
26 Home Remedies for Osteoporosis
health.howstuffworks.com/wellness/natural-medicine/home-remedies/home-remedies-for-osteoporosis.htm
Learn home remedies for osteoporosis -- everything from exercise to eating right. Find out how to keep bones strong longer.
How Near-death Experiences Work
science.howstuffworks.com/science-vs-myth/extrasensory-perceptions/near-death-experience.htm
Near-death experiences (NDEs) are seemingly supernatural events that some people have when they're at the brink of death. Find out who typically has them and how people have tried to explain them.
How Charles Darwin Worked
science.howstuffworks.com/life/genetic/charles-darwin.htm
How did Charles Darwin develop the idea of natural selection? And how did Charles Darwin and "The Origin of Species" change our thinking and our world?
How Trickle-down Economics Works
money.howstuffworks.com/trickle-down-economics.htm
Whether trickle-down economics works is a hot debate among theorists and politicians. Learn why trickle-down economics has so many allies and adversaries.
How Virtual Surround Sound Works
electronics.howstuffworks.com/virtual-surround-sound.htm
Virtual surround sound mimics the effect of multi-speaker surround-sound systems. Learn about virtual surround sound and find out how sound is perceived.
How Rubber Works
science.howstuffworks.com/rubber.htm
Rubber is an elastomer, a large molecule that can be stretched and returned to its original shape. Learn why rubber is so stretchy and how we make it.