In Pictures: 10 really small devices that could change the world

From the world's tiniest semiconductor laser to a bee-sized flying robot, these minuscule devices -- many of which cannot be seen by a human eye -- are changing our world.

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Digital buzz The next time you're harassed by a bee, look closer. It just might be Mobee, a robotic insect, that's spying on you.

Developed at the Harvard Microrobotics Laboratory, the Mobee (from "Monolithic Bee") can buzz around performing tasks such as surveillance -- or even pollinizing plants. Harvard's mechanical bee weighs about as much as a real one (roughly one-tenth of a gram), is about the size of a quarter and, like a real insect, has a pair of fluttering wings, a thorax and stabilizing halteres (small structures which operate like gyroscopes).

Unlike an insect, Mobee also has a battery, microprocessor, sensors, transmitter and antennas, and is made from 18 layers of different materials that assemble like a child's pop-up book.

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In Pictures: 10 really small devices that could change the world

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