In a recent publication that resulted from the collaboration of Heidelberg University and KIT, first authors Cluster Young Scientists Natalie Munding and Magdalena Fladung designed and manufactured microstructured bio-metamaterials that influence the behaviour of mesenchymal stem cells. The metamaterials they designed and manufactured based on a silicon elastomer-like photoresist and two-photon laser printing can create surfaces that can be used to control the behavior of stem cells in a precise and controlled manner. This could lead to the development of new tissue engineering therapies for a variety of diseases.