Force sensors (IMAGE) Brown University Caption Tiny fluorescent spheres (small red dots and insets) can be used to measure forces at the cellular level as biological tissue forms and grows. The spheres deform as surrounding cells exert forces upon them, and that deformation is used to calculate the forces. Credit Darling Lab / Brown University 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.