We are often taught that fingerprints are permanent, persistent, and everyone has them. They are undeniably used for individualization, and one of the most fundamental disciplines in forensics.
However, did you know that not everyone has them! This is often thought of as an urban myth, or part of some Hollywood crime drama, however, the truth is, not everyone has them. There are only a small number of families in the world, who are known to have a genetic mutation that results in the condition Adermatoglyphia. With this condition the friction ridges, which make up fingerprints, do not develop at all. Not on the tip of the fingers, not on the palms of the hands, and not on the soles of the feet.
If this has caught your interest, here is an article worth reading that can be the beginning of your research on this unique condition!