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.

A revolutionary size John Hancock's signature stands tall on the Declaration of Independence, but in the miniature copy made at Technion's Russell Berrie Nanotechnology Institute in Israel, it is too small to be seen with the naked eye. That's because Technion copied the entire founding document of the United States (alongside Israel's own Declaration of Independence) on a chip that's just .04 square millimeters.

About the size of a dust mite, this is a faithful copy that Technion scientists engraved 20 nanometers deep into a gold-plated surface by shooting a focused beam of gallium ions. It was given to President Obama this spring.

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