What other parts of human body are unique other than finger prints?

Lip print

Hypothetically, detectives could seal evidence with a kiss. A study in the Journal of Forensic Dental Sciences found that the pattern of elevations and depressions in the lips are as unique as fingerprints. There’s just one problem: Though lip prints have been used as identification in the court in isolated cases, criminals typically don’t smooch crime scenes. (Make sure you never pop, pluck, or pick these eight body parts.)