Endocasts (image) Michigan State University Caption Here are three brain endocasts from Michigan State University -- from top to bottom, a lion, a spotted hyena and a coatimundi. Using animal skulls from museums, MSU researchers use CT scans and sophisticated software to digitally "fill in" the areas where the brains would have been. They get the endocasts by printing out the images on a 3-D printer. Credit Michigan State University Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.