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Byline: Rupali Arora
Insects are pretty good at navigating, and seem to know how high they are flying. But how? Dr. Nicolas Franceschini, a roboticist at the French National Research Agency, believes that insects regulate altitude by watching the speed at which the ground below is moving, adjusting their height until groundspeed is optimum.
To test this idea, Franceschini created a robotic insect with an electronic eye for navigation. Tethered to a tiny ...