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How RFID Works
electronics.howstuffworks.com/gadgets/high-tech-gadgets/rfid.htm
RFID is a tracking system that uses intelligent bar codes to track items in a store. Learn more about RFID and find out how smart labels work.
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 Marijuana Works
science.howstuffworks.com/marijuana.htm
Marijuana isn't just a recreational drug for hippies and philosophy majors -- its psychoactive history ranges from Egyptian mummies to modern U.S. politics. What's the big deal about this leafy, green plant?
How Day Trading Works
money.howstuffworks.com/day-trading.htm
Day trading is buying and selling securities in the same day. Day traders take advantage of small price shifts. Learn about day trading.
UFO History
science.howstuffworks.com/space/aliens-ufos/ufo-history.htm
Modern UFO history began with the 1947 UFO sighting by pilot Kenneth Arnold. Learn the history of UFOs from ancient times to the mid-20th century.
10 Things Done Completely Out of Spite
history.howstuffworks.com/historical-events/10-things-done-out-spite.htm
Many people have gone to enormous lengths to pay back someone who did 'em wrong. Learn about 10 things done completely out of spite at HowStuffWorks.
10 Terrible Cases of Mistaken Identity
history.howstuffworks.com/historical-events/10-terrible-cases-mistaken-identity.htm
Identity errors have led to a range of awfulness like wrongly declared death. Learn about some cases of mistaken identity at HowStuffWorks.
10 People You Probably Didn't Know Were Black
people.howstuffworks.com/culture-traditions/genealogy/10-people-you-didnt-know-were-black.htm
Some people don't appear to be Black. Learn about 10 people you probably didn't know were Black in this list from HowStuffWorks.
10 Things Done Completely Out of Spite
history.howstuffworks.com/historical-events/10-things-done-out-of-spite.htm
Spite is not just for kids with broken toys. Many adults have gone to unbelievable lengths to pay back someone who did 'em wrong. Here are 10 classic examples.
How Holograms Work
science.howstuffworks.com/hologram.htm
If you want to see a hologram, you don't have to look much farther than your wallet. But the most impressive holograms are large scale and illuminated with lasers or displayed in a darkened room with carefully directed lighting. Learn how a hologram, light and your brain work together make clear, 3-D images.