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Finding Our Way with Digital Bread Crumbs

In the classic tale by the Brothers Grimm, Hansel and Gretel leave a trail of bread crumbs from their home so as not to get lost in the forest, but the plan fails when birds eat the crumbs. In the modern world, a GPS device could assist the fabled siblings. But what if they wandered into a place without GPS signals?

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technologyreview.com
4674d ago