iCandy: Data Saves the Day

Gadgets alert us to weapons, the weather, and our workouts

1 min read

Images: NYPD/AP Photo
This image highlights the ability of a terahertz radiation sensor to detect metal concealed on the body. The New York City Police Department and the U.S. Department of Defense, which are jointly developing the device, hope that it will someday sense a hidden handgun from as far away as 24 meters.

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