Proteus is a light, strong and non-cuttable material that turns back the force of a cutting tool upon itself. The development of this new material was led by an international research team from Durham University, UK, and Fraunhofer Institute for Machine Tools and Forming Technology IWU in Chemnitz in Germany. The researchers got inspiration for this invention from the tough skin cellular skin of grapefruit and the fracture-resistant shells of mollusks.
