I was reading a recent NewsNation article about investigators using what they described as a “signal sniffer” mounted to a helicopter in the search for Nancy Guthrie. The idea, according to the report, was to try to detect emissions from her pacemaker. And my brain did what it always does. It started wandering. Not in a conspiracy way. Not in a “I’ve cracked the case” way. Just in a technical, curious, “has anyone had this conversation?” kind of way. Because here’s the thing

Photonics, the technology of generating and harnessing light, is making significant strides in various fields, including medicine,...