Sleuths Read Old Booby-Trapped Letters Without Opening Them
People once folded their correspondence in intricate ways, known as “letterlocking,” to keep out snoops. A fancy new imaging technique sees right through it. Learn more about your ad choices. Visit podcastchoices.com/adchoices
Science, Spoken · SpokenLayer
March 11, 202112m 40s
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Show Notes
People once folded their correspondence in intricate ways, known as “letterlocking,” to keep out snoops. A fancy new imaging technique sees right through it.
Learn about your ad choices: dovetail.prx.org/ad-choices