adapted from Wikipedia
Fingerprints are the detailed, unique, difficult to alter, impressions left by the friction ridges of fingers. Fingerprints are deposited on smooth surfaces by the natural secretions of sweat of the finger tips. Fingerprints are useful to confirm identity. They may be employed by police or other authorities to identify individuals who are incapacitated, deceased, or unable to identify themselves, such as young children or lost their memories. The ability to recover fingerprints and compare them, led to Fingerprint analysis, which has been in use since the early 20th century and has led to many crimes being solved. Today, many criminals wear gloves to avoid being caught. In 2015, fingerprint analysis was reported to be able to determine find the person’s gender.
Fingerprints have been found on ancient Babylonian artifacts, on the walls of Egyptian tombs, Greek, and Chinese pottery, as well as on bricks and tiles from ancient Babylon and Rome. Fingerprints were used as signatures in ancient Babylon,2000 BCE, and are still used in countries where some people do not know how to write and sign their names. who in the second millennium BCE.
Fingerprints can also be a subject, or tools, of art. More than 320 students and staff at King Street Intermediate School in Danbury, Connecticut, fingerprinted themselves for fingerprint art installation for The Aldrich Contemporary Art Museum in Ridgefield, Connecticut. Artist Sandy Garnett has a whole fingerprint-themed art project.
One last point: patients with a very rare medical condition, adermatoglyphia, have no fingerprints. The have completely smooth fingertips, palms, toes and soles, but no other related medical problems.