In the Microdynamic Systems Laboratory we are exploring the limits of robotics in terms of speed, precision, dexterity and miniaturization. This endeavor requires development of new sensing, actuation, and control technologies for agile robotic systems that can be applied to a variety of real-world situations. Major themes of our work include moving toward robotics operating at or below the micrometer scale, simplifying robotic mechanisms while providing greater functionality through software, and providing new ways for humans to interact with the world through robotics. Examples include sensor-moderated coarse-fine manipulation, miniature factories for precision assembly, magnetic levitation haptic interfaces that allow humans to interact with remote or simulated environments through the sense of touch, dynamically-stable mobile robots for human environments, and high-speed walking machines.