A paper from Professor Howon Lee’s group Wins Materials Horizons Outstanding Paper Award 2019. In this paper, Professor Lee and his students present an innovative 4D printing approach to create geometrically reconfigurable, functionally deployable and mechanically tunable metamaterials. Produced through digital 3D printing with a shape memory polymer, the lightweight microlattices show extraordinary ability in shifting stiffness and shock absorption by orders of magnitude, as well as in reprogramming of their shapes for a variety of purposes. The authors envision that the new class of programmable architected materials with remarkable versatility and adaptability may lead to a broad range of smart engineering applications.” This research was also featured in Rutgers Today and can be found here.