This microscopic scale and sensitivity allows the sensor to map a high-resolution image of electrical charge that occurs over the surface of a source material (for example a human finger), when it makes contact with a thin insulating surface (ie a plastic surface).

FORBES: Can Forensic Scientists Tell How Old A Fingerprint Is?

The headline, original sharer's commentary, time of sharing and source for each story are posted along with an image from each story.

WSJ: Snip and Save or Put a Pin in It: Two Ways to Share Web Faves