Even the savviest city residents get lost sometimes. According to one estimate, 33% of New Yorkers have no idea which way is north at any given time. And anyone who has used Google Maps knows that GPS can be wildly unreliable. Could there be a better way to find your place on a map than by relying on satellite positioning and Wi-Fi triangulation? As highlighted on Prosthetic Knowledge, researchers at the University of Cambridge have created a promising neural network called PoseNet. From a single snapshot from wherever you stand, it can localize your position in just 5ms--that's about 60 times faster than it takes you to blink.