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In the wiggle of an ear, a surprising insight into bat sonar

from Scientific American

One big problem with putting autonomous drones to work delivering packages—or flying search — and-rescue missions — is that the sky is complicated and unpredictable. Trees, utility wires and spiraling footballs can turn up almost anywhere in the flight path. A new strategy for dodging these obstacles could come from an unexpected source: the way bats wiggle their ears. The idea first occurred to Rolf Mueller, a Virginia Tech electrical engineering professor, a few years ago while looking at bat photographs. He noticed that the ears of some species often looked blurry, because the animals were continually making rapid ear movements. But why? more

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