PACT Progression Stack (IMAGE) U.S. National Science Foundation Caption Angelucci and her colleagues used the technology to stream 3-D images of a primate's visual cortex. They paired this tool with a neuroscience technique called CLARITY, which makes surrounding brain tissue transparent. (CLARITY was developed by NSF-funded researchers in 2013.) Shown here is a brain becoming transparent, thanks to CLARITY. Credit Cameron Christensen, University of Utah Usage Restrictions None License Licensed content 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.