Many robots can fly, but only a few forsake rotors for more natural, if inefficient means of propulsion. These flapping bots have interested folks at the Delft University of Technology for many years, and their latest dragonfly-like effort has achieved what theyre calling a first among winged machines: Autonomy. The DelFly Explorer is larger than creations past, but still weighs only 20g (0.7 oz), or the equivalent of roughly four paper airplanes.
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