Scientists at Harvard University used 3D printed brain to learn how a human brain develops it's folds. The whole new concept that not only biochemical processes but physical forces are also involved in brain folds formation. This new discovery will help better understand the concepts behind neurological disorders like Alzheimer's disease and Schizophrenia.
Source: http://www.latimes.com/science/sciencenow/la-sci-sn-folded-brain-3d-printing-20160201-story.html