“Researchers at the University of Minnesota have developed a unique 3D-printed transparent skull implant for mice as a way to view real-time activity on the brain surface. The device, dubbed See-Shell, could help provide new insight for human brain conditions such as concussions, Alzheimer’s and Parkinson’s disease…”

Source: https://www.3ders.org/articles/20190403-3d-printed-transparent-skull-lets-scientists-see-how-the-brain-works.html