To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1 3D rendition of an ESC colony with one cell dividing inside the colony. The left frame shows a 3D rendition of the membrane staining (CellMaskTM, black) and the right frame shows a 3D segmentation of the colony. Three-dimensional geometry controls division symmetry in stem cell colonies Agathe Chaigne, Matthew B. Smith, Rocio Lopez Cavestany, Edouard Hannezo, Kevin J. Chalut, and Ewa K. Paluch J Cell Sci 2021. 134:None-None; doi: 10.1242/jcs.255018 Download Original Video