IBM have carved a 3D map of the earth using a new nanometer-scale silicon milling machine they have developed. I suppose it’s not really printing as what this device is doing is actually carving away particles but still its extremely interesting.
The map that measures 22×11 micrometers and that took 2 mintutes and 23 seconds to make, would fit 1000 times on a single grain of salt. The nanomill used to make it uses heat and pressure to carve with extreme acurracy.
They also created a scale 3D model of the Matterhorn mountain, heres a video for more information: