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The idea of a "space elevator" to ferry people and cargo to Earth orbit and beyond, far more cheaply and safely than rockets, has been bandied about for decades. Bradley Edwards, research director of the Institute for Scientific Research in West Virginia, has come up with a design he thinks could work. He would hang a paper-thin, one-meter-wide ribbon from a geosynchronous satellite--one that always hovers over the same spot--anchor it to the ground and send the satellite to higher orbit as a counterweight. "Climber" vehicles could carry up a 12-tonne payload. He spoke with NEWSWEEK's Jonathan Adams:
What's to keep the whole thing from flying out into space or crashing down to Earth?
The upper half of the elevator gets thrown outward [by Earth's rotation], and the bottom end is pulled down by gravity. Even if you cut it at the ...