Those plucky quadrotors at UPenn's GRASP laboratory never cease to amaze. In this latest video, watch them autonomously build a structure. In the future, construction workers will be a buzzing, mildly disturbing haze of mechanical diligence.

Quadrotor researcher Daniel Mellinger notes on YouTube, "We tell the quadrotors what structure to build and they figure out the assembly plan and then build it." Fascinating stuff. [Via Botjunkie]