Fingerprints are Unique
Look closely at the grooves of your fingers on the opposite side of the nails. These grooves make a pattern. The pattern on your fingers will never match with anyone else, not even the other of the twins if you were born with him or her. The unique pattern of fingerprints in each individual were established in 1901. Since then the police has been using them for identifying people from their fingerprints. This is part of the forensic science. But today these have found more uses. Now even visas and passports use them to identify the immigrants. In future, even bank accounts may be operated with their help. If you develop a cut on your fingers, these might get disturbed for some time but the normal pattern returns once the injury is healed. Computers can match fingerprints in a fraction of a minute today.