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How Eye Puzzles Work

entertainment.howstuffworks.com/puzzles/eye-puzzles.htm

Eye puzzles are optical illusions that, when viewed properly, can reveal hidden images. Learn how eye puzzles work at HowStuffWorks.

Maillardet's Automaton Is a Marvel of 19th-century Robotics

science.howstuffworks.com/maillardets-automaton.htm

Maillardet's Automaton, built around 1800, can write poems and draw pictures and was a precursor to today's sophisticated robots.

Can an MRI machine also act as a lie detector?

people.howstuffworks.com/mri-lie-detector.htm

A MRI lie detector could detect truthfullness more accurately than a polygraph machine. Learn about MRI lie detectors and and MRI lie detection.

How Virtual Reality Works

electronics.howstuffworks.com/gadgets/other-gadgets/virtual-reality.htm

Virtual reality uses a computer to create a simulated three-dimensional world. Find out how virtual reality works and learn about the future of virtual reality.

The First 'Killer Robot' Was Around Back in 1979

science.howstuffworks.com/first-killer-robot-was-around-back-in-1979.htm

With the Campaign to Stop Killer Robots heating up, we step back a few decades to look at the first human death by robot.

Top 10 Appliances We Can't Live Without

home.howstuffworks.com/10-appliances.htm

In a pinch, you could probably do without most of the appliances in your home -- but would you want to? Life would certainly be different without these 10.

Why do we study bugs?

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There are many reasons why we study bugs, from protecting crops to preventing the spread of disease. Learn more about why we study bugs at HowStuffWorks.

5 Long-lasting Building Materials

home.howstuffworks.com/home-improvement/construction/5-long-lasting-building-materials.htm

Construction has come a long way from the mud huts or canvas tents early man. But what materials should be used to keep that roof securely over our heads?

How Astrolabes Work

electronics.howstuffworks.com/gadgets/clocks-watches/astrolabe.htm

Astrolabes are exquisitely crafted instruments that have hundreds of uses. Isn't it time you learned how to use this handy decoder of the sky?

How can dolphins disarm sea mines?

animals.howstuffworks.com/mammals/dolphin-disarm-sea-mine.htm

Can dolphins disarm sea mines? They may not disarm them, but they can certainly find them. Learn more about whether dolphins disarm sea mines.

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