Ever wonder how the Global Positioning System (GPS) works? This extraordinarily complex system is actually based on some simple concepts. Find out what they are in this Shockwave game.

The network of satellites and incredibly sophisticated mobile technologies that power GPS navigation has become a ubiquitous part of modern life. Unlike many other modern innovations, GPS systems ...

It's a shame how many people don't know how to use a compass, especially when the National Park Service lists it as a top 10 safety item. Here's how to get started. The post How to use a compass for ...