No GPS Signal? No Problem: This Little Chip Knows Where You Are

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, Swiss company u-blox just devised a chip that keeps you on course when the satellites drop out, using the most old-fashioned of navigation techniques: dead reckoning.