Peering into the cell nucleus (IMAGE) Princeton University, Engineering School Caption Researchers have developed a tool that can bend DNA strands using light. The work represents a new way to probe the genome. Shown here, from an unrelated study, are chromosomes (blue) inside a human cell nucleus. Credit Image by Steve Mabon and Tom Misteli, NCI Center for Cancer Research, National Cancer Institute, National Institutes of Health Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.