Your Global Positioning System guides you across town; it also helps land planes, and anticipates earthquakes. Milner takes us on a fascinating tour of a hidden system that touches almost every aspect of our modern life, and shows how it has created new forms of human behavior. But the potential misuse of GPS data by government and corporations raise disturbing questions about ethics and privacy. GPS satisfies the scientific urge toward precision--...

The editors and staff of Geocaching.com take the reader through all of the core essentials for caching including how to play, tips and tricks for finding and placing caches, variations on traditional caching, and much more. In addition, the reader can learn about exciting new changes to the game and the new GPS-enabled games that will take cachers to an entirely new level of fun and adventure.