NASA Finds 'Impossible' Engine May Be Usable For Space Flight

It's really starting to look as if an "impossible" space propulsion technology actually works. Researchers at NASA's Johnson Space Center in Houston have found that a microwave thruster system that requires no propellant does indeed generate a small amount of thrust, Wired UK reported on July 31. If the technology pans out, it could make spaceflight far cheaper and speedier, potentially opening up much of the cosmos to exploration, advocates say. "Test results indicate that the RF [radio frequen...