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10 Outrageous Experiments Conducted on Humans
Some truly bizarre and troubling things have been done through the ages in the quest for scientific knowledge. The 10 experiments on this list all made humans into lab rats.
How Facial Recognition Technology Works
electronics.howstuffworks.com/gadgets/high-tech-gadgets/facial-recognition.htm
Humans have always had the innate ability to recognize and distinguish faces, but computers only recently have shown the same ability. Learn how facial recognition systems work.
How Yo-Yos Work
entertainment.howstuffworks.com/yo-yo.htm
Yo-yos can be traced back at least 2,500 years. It's a toy with true staying power, and it has lately gone high-tech -- ever heard of a yo-yo with a clutch? Learn about yo-yo physics, yo-yo tricks, yo-yo history and some serious upgrades in yo-yo design.
How Joysticks Work
electronics.howstuffworks.com/joystick.htm
Video games are amazing creations, but the fact remains -- if you can't input, you can't play. Take a look inside the quintessential game controller and see how it has evolved over the years.
How Fingerprint Scanners Work
computer.howstuffworks.com/fingerprint-scanner.htm
Your fingerprints are not only unique; they're also very hard to fake and even harder to misplace. What better ID to use in a security system? Learn how fingerprint scanners know it's you.
How Satellite Radio Works
electronics.howstuffworks.com/satellite-radio.htm
Satellite radio is up and running. This means nonstop music (beamed down from space, no less), no ads, and coast-to-coast reception -- learn how satellite radio works!
How Animal Camouflage Works
animals.howstuffworks.com/animal-facts/animal-camouflage.htm
Natural camouflage is an amazing thing - it increases an animal's chances of survival by tricking predators. Learn all about animal camouflage.
How Ozone Pollution Works
science.howstuffworks.com/environmental/green-science/ozone-pollution.htm
We want the ozone layer, but we don't want ozone pollution... Good in the atmosphere but bad on the ground? Find out about ozone pollution, how it affects you and what you can do about it.
How To Compress a File
computer.howstuffworks.com/file-compression.htm
File compression allows users to make one or more files into a smaller zip file. Learn about file compression, zip files and compression algorithms.
Can the government control a stock market crash?
money.howstuffworks.com/government-control-stock-market-crash.htm
A stock market crash can devastate the economy. Learn how and why the Fed stepped in after the subprime mortgage fallout.