Researchers thought that flies chose their altitude based on optic flow, a phenomenon familiar to anyone who has ridden an airplane.
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Google combines skycrane, VTOL and lifting wing to make drone deliveries - 6 views
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SOLAR IMPULSE - AROUND THE WORLD IN A SOLAR AIRPLANE - 0 views
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Airbus Concept Has Weird Wings, Morphing Seats | Autopia | Wired.com - 6 views
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