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Space tunnel being built to test ion engines, satellites
- DanBC 15y agoI'd love to think that humans would go to the moon again, or Mars, but (http://physics.ucsd.edu/do-the-math/2011/10/why-not-space/ http://physics.ucsd.edu/do-the-math/2011/10/why-not-space/) shows that it's not likely. 600 km is a little bit more than LA to San Francisco.