 RASSOR has fore-and-after counter-rotating bucket drums to dig in soil in almost zero gravity.The GMRO Lab is involved in organizing and judging the NASA Robotic Mining competition, held annually at the Kennedy Space Center each May, and the Swarmathon University Challenge for swarming robots.GMRO also built the KSC Hazard Field at the north end of the Space Shuttle's runway, which is a field of simulated craters and boulders in sandy regolith.