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Wall Street's reputation as an aggressively male zone, running on free-flowing machismo, utterly hostile to women and irredeemably suited to adrenaline-chasing, strip club-patronizing he-men? It's scientifically accurate, according to one of those studies that uncover the secrets of life by measuring people's fingers. Research by former Deutsche Bank derivatives trader John Coates has found that traders with the longest ring fingers as compared to their index fingers—indicating exposure to high levels of male sex hormones in the womb—make three times as much money as their less biologically blessed co-workers. It certainly simplifies matters for job recruiters/rich husband-seekers: Just ask for a hand-photocopy and all will be revealed!