rotenberry writes "The current issue of Caltech's Engineering and Science magizine contains the article "Next Exit 0.5 Million Kilometers - A Caltech/JPL collaboration explores the 'Interplanetary Superhighway.'" which describes "...the Interplanetary Superhighway - 'a vast network of winding tunnels in space' that connects the sun, the planets, their moons, and a host of other destinations as well. But unlike the wormholes beloved of science-fiction writers, these things are real. In fact, they are already being used." However, it takes a very long time to get there."
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