You might hide your bout of acute stress from human observers, but thermal imaging cameras won't be fooled: our noses cool sharply when we're under pressure, the result of our bodies altering blood ...

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!–paging_filter–pShoes with recording devices built into the heels, coins embedded with deadly needles, pens that shoot tear gas, umbrellas that fire poison pellets—ah, for the olden days of spying, ...

Imaging being able to wear your smartphone on your wrist, not as a watch, but literally as a flexible band that surrounds around your arm. How about clothes that charge your gadgets just by wearing ...