There's never a good reason for a modern outdoor fanatic to run off into the wild without a GPS navigation device, or at least a good old map and compass. But it still happens anyway. Or maybe you started out with navigation gear, but became separated from these pathfinding tools. Our ancestors found their way in the world without an electronic box telling them when to turn right, and we can too. Natural navigation is a dying art form, but a very valuable skillset, especially for those who wander far off the beaten path. Here's how you can find your way, using only the clues that nature provides.