Design, Fabrication, and Characterization of an Untethered Amphibious Sea Urchin-Inspired Robot.

Sea urchins can easily navigate a wide range of challenging environments through the coordinated action of thousands of individually addressable rigid protective spines and flexible, reversibly adhesive tube feet. To investigate the potential implementation of these unusual locomotory appendages in a robotic context, we describe here the design, fabrication, and characterization of an untethered s...