3D Printing of Tools and Medicine. Star Trek's "Replicator" and "Tricorder" Already Real.

Printing A Giant Wrench With A 3D Printer

http://yootuubee.com/video/WmDz7Q9_h6c 

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NASA video demonstrating how tools can be "printed" at need. In effect, Star Trek's "replicator" is already real. http://www.youtube.com/watch?v=pQHnMj6dxj4

TED Talk by Scottish chemist, Lee Cronin. It's entitled "Print Your Own Medicine" and means exactly what it says. http://www.ted.com/talks/lee_cronin_print_your_own_medicine.html