By Robert Sorokanich

GPS is a godsend when it works. Problem is, there are plenty of places it doesn’t work—tall skyscrapers, concrete overpasses, and other huge structures all block the satellite signal you need to navigate. Luckily, …

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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/9lu5-Wxx-wY/no-gps-signal-no-problem-this-little-chip-knows-where-1518907218