Scientists have improved on their original technique for peering into the intact brain, making it more reliable and safer, researchers report. The results could help scientists unravel the inner connections of how thoughts, memories or diseases arise. When you look at the brain, what you see is the fatty outer covering of the nerve cells within, which blocks microscopes from taking images of the intricate connections between deep brain cells. The idea behind this study was to eliminate that fatty covering while keeping the brain intact, complete with all its intricate inner wiring.