These stunning images are computer visualizations, made by mashing data like air traffic GPS signals from satellites, taxi cab activity, Internet activity, highway use and Internet activity with Google maps’ Mapplet technology…

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With our economy racing back to the 1930s, pretty soon these gadgets might be new again. So let’s reconsider a few of these bygone technologies and see how they might be re-purposed for life in the 21st Century.

In the days before radar existed, this was the only way to detect incoming aircraft. These days it could be adopted by the NSA to listen in on Al Qaeda chatter…

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