Fingerprint.
This is a fingerprint if you were wondering a loop fingerprint A known fact is even though I have a loop. Others can have a loop but my loop is not the same as any other. Fingerprints are made from the several layers of skin which makes a pattern we know as the fingerprint. Say you die and many people die around you then they can identify you from your fingerprint! In the world war, II the FBI was collecting hundreds of prints from all the sadly killed people. By 1943 the FBI had collected over 70 MILLION fingerprints, then the agency moved to a warehouse factory named " the fingerprint factory". That's right they need a warehouse to contain all those fingerprints. Fingerprints are very helpful and can catch criminals and have for centuries as today. The cute Australian Koala even has a fingerprint, it is almost identical to a humans fingerprint. Your fingerprint starts from only being in your mother...
