Strange but true

Back in 1999 I broke (well crushed) my left thumb. I ripped the nail out by the root. And when it heeled the right side of the nail never re-attached to my thumb. It was always a pain I could never keep the damn thing clean, I know it sounds strange but its true. And today I go to look at it as I was cleaning my nails and low and behold it is attached and looks normal? WHEN IN THE HELL DID THIS HAPPEN?