A research team from the Vienna Technical University has developed 3D printing technology capable of creating nano-scale models, no bigger than a grain of sand, at record-breaking speeds. Previous structures took hours or days to make, while VTU's 3D printer can create one in about four minutes.

The team developed a printing process called two-photon lithography, which uses a focused laser beam to harden liquid resin in order to create nano-scale objects of solid polymer. The technique could be used to make small biomedical parts for medical purposes.

Check out some of the objects the scientists were able to create.