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How eBay Works

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Where can a person get $28,000 for a partially eaten grilled cheese sandwich that may or may not contain the image of the Virgin Mary? On eBay, of course. Find out all about the largest auction site in the world.

How Content-recognition Software Works

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Content recognition software is used to help prevent copyright infringement. Learn about the development and uses of content recognition software.

How Solar-powered Backpacks Work

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Solar-powered backpacks are great travel gadgets. Learn more about solar-powered backpacks at HowStuffWorks.

What does 'digitally remastered' mean?

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Sound engineers can remove flaws from recordings. Learn more about digital remastering at HowStuffWorks.

How Wind-turbine Chargers Work

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Wind turbine chargers are great travel gadgets. Learn more about wind turbine chargers at HowStuffWorks.

Which gadget came first?

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Do you know which gadgets came first? Test your knowledge of gadgets in recent decades and see if you know which came first.

What Frequency Do You Resonate At?

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Like tuning forks, all objects have a natural resonance - or a frequency at which they tend to vibrate that affects their interactions with their environment. Wondering why you and other people seem to share a "vibe"? Take this quiz to find your natural frequency!

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