The Optical Imaging Facility at USC’s stem cell research center specializes in imaging and analysis of biological material. The facility provides access to powerful microscopes that enable scientists to take high-resolution pictures of stem cells. These include still images and time-lapse videos. Cells or parts of cells can be labeled with fluorescent dyes, which enable better identification of molecules and structures within cells, or to trace the fate of cells as they migrate, divide and differentiate within tissues.