Cells make a turn (IMAGE) Princeton University, Engineering School Caption Princeton researchers created a device that uses electrical fields to herd cells like sheep. This time-lapse movie shows a 90-degree turn in a layer of cells viewed under a microscope for eight hours. Credit Video courtesy of the researchers; GIF by Neil Adelantar Usage Restrictions Noncommercial use only 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.