“ How to draw parabola with it's exact focal point, kindly confirm. (read full comment) ”
Posted on October 3, 2008 at 12:22 PM EDT
The TR10
Our annual list of 10 technologies that could change the world. This year: Light-field photography. Solar microgrids. Crowdfunding. Facebook's Timeline. And more...
The Library of Utopia People Power 2.0
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