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This stainless steel car engine part was created using a laser-sintering 3D printer.
While laser sintering printers are currently one of the priciest variety of 3D fabricators available, they also reduce waste as any unused metal powder can be reused.
This satellite sensor was produced by printing electrical circuits using metal inks.
Printing sensors directly into a satellite's structure saves a lot of room, according to the team that made the sensor from the University of Texas.
The technique may one day provide a reliable way to print out electronic gadets, by printing out circuits inside their casing, said Ryan Wicker, mechanical engineering professor at the university.
The sensor is being sent into orbit for testing in the harsh environment of space, where satellites are subjected to extremes of temperature and heavy doses of solar radiation.
One of the more contentious uses of 3D printers is to produce weaponry.
This is a gun that was printed out by a Finnish journalist, who downloaded a design freely available on the internet, printed out the pistol, dubbed the 'Liberator', and fired it.
The bullet fired straight down the range but the gun broke into four pieces.
Debate is currently taking place over how to best regulate people's ability to produce weapons using 3D printers.