EVANSTON, Illinois, June 9 -- Northwestern University posted the following news release:

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Jumping spiders inspire ultra-efficient 3D camera

SpiderCam produces real-time 3D maps using less than a watt of power

* With poppy seed-sized brains, jumping spiders compute distances in a highly efficient manner

* Their eyes contain multiple retinal layers, each focused at a different depth

* By comparing differences in sha . . .

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