“In the longer run, this technology could find many more uses, its developers believe. For example, a doctor could scan for arrythmias and other conditions remotely, or hospitals could monitor the condition of patients without having to wire them up to machines.” But in the meantime, the tech is being used along with a laser to identify people from a distance—by their heartbeat. “The Jetson prototype can pick up on a unique cardiac signature from 200 meters away, even through clothes.”