Digit Ratio

They say you can forget palmistry but the size of your digits may tell more about you. here's the Washington Post article
A new study in a British medical journal finds a link between the relative length of a woman's index and ring fingers and her athletic prowess. The research takes its place among dozens of other studies tying that ratio -- known in finger-measurement circles as 2D:4D (the relationship between the length of the second digit, 2D, and the fourth) -- to all manner of physical and psychological traits, from breast cancer risk to schizophrenia.