Recently in the Quadrotors Category

ESA astronaut Luca Parmitano last weekend helped to explore the caverns under Sicily using a drone that deliberately bumped into its surroundings in order to build a map.

Video: Construction with Quadrotor Teams

Watch as these quadrotors (small helicopters) construct a small structure - alone and as a team. Imagine if you could replace the rotors with small cold gas jets for use in microgravity or on the Moon. More info at Upenn's General Robotics, Automation, Sensing and Perception (GRASP) Laboratory (via io9)