There are many who work to build ever-improving legged robots for new and improved applications in military, surveillance, leisure, and education. Animals have a well-defined approach to running at high velocities With respect to small-scale engineered systems, limitations on stride kinematics are common across many dynamic running robots. Kinematic adaptations which would increase the stride length of these robots are possible, but they incur a cost in complexity either in hardware, control, or both. To help solve these challenge, researchers at Berkeley have investigated the efficacy of locomotion strategies in their respective limits, and have developed milliscale and microscale robots using the Smart Composite Microstructures (SCM) process which creates linkages by combining rigid and flexible materials using planar processes. Their latest creation, the X2-VelociRoACH, is made primarily out of cardboard and measures just 10 cm long, yet it can run at stride frequencies up to 45 Hz and velocities up to 4.9 m/s, making it the fastest legged robot relative to size (the X2-VelociRoACH is actually faster than a real roach, which can achieve 1.5 m/s). With the X2-VelociRoACH, the researchers have demonstrated a stride frequency of a legged robotic platform far beyond what an animal of equivalent size would use.