To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Video 6 Movie S6. Symmetric bio-bot movement at 1 Hz. Top-view movie demonstrating the net movement of a symmetric bio-bot at 1 Hz (1× speed). Scale bar, 1 mm. Three-dimensionally printed biological machines powered by skeletal muscle Caroline Cvetkovic, Ritu Raman, Vincent Chan, Brian J. Williams, Madeline Tolish, Piyush Bajaj, Mahmut Selman Sakar, H. Harry Asada, M. Taher A. Saif, and Rashid Bashir PNAS. 2014. 111:10125-10130 DOI: 10.1073/pnas.1401577111 Download Original Video Browse All Videos »