It’s been proven scientifically that every human being since the days of Adam, PBUH, until now has a special finger print that distinguishes them from other people and that no two persons have the same print.
Such prints are distinguished by complex lines of bends, a method to distinguish the identity of people. If the fingers of people were flat and didn’t have such lines, detectives wouldn't be able to trace crimes for instance.
The Glorious Qur'an revealed this scientific fact that has been discovered merely recently for the Glorious Qur’an tells us that God, the exalted is able to put together the tips of man’s fingers; Allah, the Almighty Creator says:
“Yes, We are able to put together in perfect order the very tips of his fingers.” (Qur'an Surah
Qiyama or The Resurrection 75:4)