A fingerprint consists of one or more connected ridge units of friction ridge skin. There are three basic patterns of fingerprints: whorl, loop, and arch. Some people have one pattern, others two, and others all three patterns. – WTF Fun Facts
Source: Say What?! Fingerprints, A Crazy Concept – Allbodies
By the 17th week of pregnancy, a child’s unique fingerprints have already formed and the pattern won’t change. – WTF Fun Facts
Source: https://www.livescience.com/30-lasting-impression-fingerprints-created.html
Over 12.5 million plastic rings were made in order to fabricate chain mail for the Lord Of The Rings movie. Two crew members linked the rings by hand into suits of armor. By the end, they had worn their fingerprints off of their thumbs and index fingers. – WTF Fun Facts
Source: https://www.imdb.com/title/tt0120737/trivia?ref_=tt_ql_2