Let’s set the scene. You’ve heard a few friends talk about this thing called “geocaching” and you fancy you might be pretty good at it. After all, you are fairly certain that your uncanny ability to locate lost car keys must mean that you have pirate’s blood coursing through your veins. With your handy-dandy smart phone in hand, you set off to find the nearest geocache. According to your GPS you are right on top of it – but wait! Where’s the X marks the spot? You search high and low. You are on the verge of giving up when [...]