DEVICES

Ever wondered how that thing works? Explore the inner workings of many common devices and inventions, as well as those that aren't so common, such as compasses, gyroscopes and bug zappers.
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I've heard of bank robbers being foiled by a "dye pack" put in their money stash. What is a "dye pack"?

I've heard of bank robbers being foiled by a "dye pack" put in their money stash. What is a "dye pack"?

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