Massachusetts Institute of Technology May 21 2025 Measuring the density of a cell can reveal a great deal about the cell's state. As cells proliferate, differentiate, or undergo cell death, they may gain or lose water and other molecules, which is revealed by changes in density. Tracking these tiny changes in cells' physical state is difficult to do at a large scale, especially with single-cell resolution, but a team of MIT researchers has now found a way to measure cell density quickly and