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.

Tiny tunes It may be one of the biggest "small things" here, but at 0.75 in. on a side and weighing less an ounce, theKube media player makes an iPod Nano look positively huge.

Inside is a circuit board the size of a fingernail and a 6-hour lithium polymer battery. It can play music in all the popular audio formats from a microSD card (a 2GB card is included). There are controls for play and pause, moving tracks forward or back, and adjusting the volume.

Available in pink, black, light green, yellow and white, theKube costs $34.

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