At the University of California Merced, the students in Professor Kara McCloskey's class are building robots - but they're not your typical robots. They're bio-bots, tiny robots made from living tissue. They move, they walk, and they don't have any electronic components - they have muscles, which are grown from stem cells and attached to 3D printed backbones. The muscles are responsive to blue light, which the students then shine on their creations to get them to contract and move. Ultimately, such bio-bots could be used for applications in healthcare, security and the environment. Read more at 3DPrint.com: https://3dprint.com/161518/3d-printing-biobots-tissue/