The Best Inventions Of The Year

From the phone that has changed phones forever, to futuristic cars, to a building made of water, to a remote-controlled dragonfly—a dazzling display of ingenuity

—By Maryanne Murray Buechner, Kristina Dell, Andrea Dorfman, Lev Grossman, Anita Hamilton, Rebecca Winters Keegan, Jeffrey Kluger, Michael D. Lemonick, Coco Masters, Lisa McLaughlin, Alice Park, Julie Rawe and Deirdre van Dyk

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Pretty Sweet

Copyright Sony Corporation
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Correction Appended: November 6, 2007

How's this for eco-friendly: a battery that runs on sugar. Sony's bio cell, unveiled in mid-2007, uses glucose-digesting enzymes to extract electrons from any sugary solution (as with other batteries, the electrons flow around the circuit to generate electricity). Connect four of the 50-milliwatt cells, and you've got enough juice to keep your MP3 player humming.
Available Prototype
sony.net



The original version of this article stated that the Sony bio cell prototype was unveiled in mid-2008. It was actually unveiled in mid-2007.

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