Just a few decades ago 3D printing technology still seemed like science-fiction. But it kept on developing in various directions, offering more and more possibilities.
The first printers supporting this technology were constructed in the 1990s. Prints that came out of those machines were not exactly perfect, but thanks to the continued work on improvements, the quality has been steadily increasing. 1999 marked a breakthrough in 3D printing in medicine: in the USA a human organ put in a biodegradable scaffold printed by a 3D printer was successfully transplanted. One year later scientists printed a real, working kidney and transplanted it into a rat.