54 () posted 160 days ago by Bigtortoise 160 days ago by Bigtortoise +54 / -0 33 comments share 33 comments share save hide report block hide replies
I think those ideas are taken by agencies like NASA, or the DoD, for "national security reasons". Once they get their use out of it and have advanced it, they release the original version 20 years later as a "new" invention.