10 NASA space technologies that may never see the cosmos

NASA has robots, rockets, inflatable homes and lots of other advanced technology that may never lift off.

Robots: Robots the size of riding lawn mowers were part of a possible scenario that saw them building a lunar outpost before humans make their next trip to the moon. The robots, like the lunar excavator pictured here, would build berms around landing zones to trap the grit blown out when space vehicles land and take off.

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