Fingernails Signal Dexterity
They grow faster on hand you favor
(HealthDayNews) -- Fingernails grow an average of .02 inch each week, but if you're left-handed, the nails on your left hand will grow faster than those on your right. And vice versa, according to Amazing Facts About Your Body, a book by Doubleday and Co.
Also, the nail on the middle finger grows faster than all the others.
And, in case you ever wondered, it is possible to transplant fingernails.