Alien anti-gravity propulsion would destroy trillions in the global oil economy, Sean Stone says

Sean Stone has claimed that truly operational alien-style anti-gravity propulsion would wipe out 'trillions of dollars' in ...
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Engineer claims a breakthrough that could overcome gravity

For more than a century, gravity has been the immovable backdrop of modern physics, a force that can be described and exploited but never truly switched off. Now a former NASA engineer says he has ...