The country’s GPS systems might be more vulnerable than you think — and the stakes are high. A Global Positioning System failure could affect transportation, banking and emergency operations. But ...

For just $249, you get accurate tracking, great battery life, and a lightweight watch with a display you can read in bright ...

Every day, Americans depend on the Global Positioning System far more than they realize. Positioning, Navigation, and Timing services such as GPS underpin nearly every aspect of modern life — from ...

Quantum devices that measure Earth's magnetic fields could help replace GPS—if researchers can figure out how to tell when ...