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]