Breast cancer cell movement schematic (IMAGE) Aalto University Caption A new technique measures forces generated by cancer cells with a biological microscope that detects biocompatible spheres within the tissue material. Cellular forces are computed using information about two sphere types, one that detects nanoscale motion, and another that measures mechanical properties. The technique reveals that cancer cells generate forces in a stepwise manner, and the forces cumulate within the tissue material, surrounding a breast-cancer tumour. Credit Luka Sikic/Juho Pokki group/Aalto University Usage Restrictions May be used in publications related to this release with appropriate credit. License Original 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.