English Lesson
Discover can mean invent or learn about Keith. It was the latter I meant which should have been obvious.
I was referring to this blurb "A NASA Watch reader informed me that NASA has indeed been looking at how to do this in space. Check out this In Situ Fabrication and Repair page at NASA MSFC. Another reader informed me that LaRC is also working on this technology (see this page) Indeed, they have a portable system that will be flying on a C-9 microgravity aircraft in August. Cool stuff." which seemed to indicate you were not aware this had been under consideration for a long time.
Regards,
Mark