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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If you think it's difficult finding your way on a small smartphone map, it could be worse: IBM scientists have created a nano-scale 3D map that's only 11 x 22 microns, or less than half the thickness of a human hair. On this map, Mt. Everest is only 70 nanometers tall compared to more than 29,000 feet in real life.

Scientists used a heated 500-nanometer silicon tip to etch the relief map into the polymer surface. It was recently recognized by the Guinness World Records as the smallest 3D map created.

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

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