It is based on the maple seed. For anyone who’s lived in an area where maple trees grow, you’ve probably seen these seeds falling from the trees. They’re asymmetrical wings which spiral gently down, and can travel for a fair distance on the wind. Lockheed Martin has used this design with motor to allow for sustained flight, and software provides control. The whole vehicle spins, including the camera, but the operator sees a steady picture thanks to image processing. It’s a radical design, and I think it looks pretty cool. It is certainly different from the typical fixed- or rotary-wing designs.