That little blue dot likes to mock. Glowing bright on a smartphone's map, it's usually a reliable marker of the user's location. Except when it's not. Anyone who's tried to use it to navigate out of a ...
On Dec. 19, NASA announced that engineers at their Jet Propulsion Laboratory (JPL) in Pasadena, California, had developed a system that could track firefighters in burning buildings. NASA first ...
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