Jetson, a new prototype developed for the Pentagon, can identify people up to 200 meters away by analyzing their heartbeat using an infrared laser (David Hambling/MIT Technology Review)

David Hambling / MIT Technology Review:
Jetson, a new prototype developed for the Pentagon, can identify people up to 200 meters away by analyzing their heartbeat using an infrared laser  —  The Jetson prototype can pick up on a unique cardiac signature from 200 meters away, even through clothes.  —  Everyone's heart is different.

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