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SpaceX CEO Elon Musk unveiled revised plans to travel to the Moon and Mars at a space industry conference today, but he ended his talk with a pretty incredible promise: using that same interplanetary rocket system for long distance travel on Earth. Musk showed a demonstration of the idea on stage, claiming that it will allow passengers to take “most long distance trips” in just 30 minutes, and go “anywhere on Earth in under an hour.”

Musk proposed using SpaceX’s forthcoming mega-rocket (codenamed “Big Fucking Rocket) to lift a massive spaceship into orbit around the Earth, which would then settle down on floating landing pads near major cities. Both the new rocket and spaceship are currently theoretical, though Musk did say that he…

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