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Space explorers have yet to get their hands on the replicator of "Star Trek" to create anything they might require. But NASA has developed a technology that could enable lunar colonists to carry out on-site manufacturing on the moon, or allow future astronauts to create critical spare parts during the long trip to Mars.
The method, called electron beam freeform fabrication (EBF3), uses an electron beam to melt metals and build objects layer by layer.
Originally posted by Saidin
This sounds like an extremely advanced 3-D printer. They build things up from scratch, layer by layer, using wax and dye.. may as well look for a video..
There we go.
Weapon-wise.. They could probably use this technology to make a bomb that has no opening to dismantle. That's all I could come up with off the top of my head.