Look at the people around you. Do any of them have ring fingers longer than their index fingers? If so, run for your life.
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The actual scientific article is more nuanced, of course. Researchers with the Centre de Recherche Charles-Le Moyne in Quebec examined 44 people for finger lengths to consider the hypothesis that longer ring fingers are associated with high testosterone exposure during fetal development.
Such people generally had higher incidences of mental toughness, antisocial personality disorder, amphetamine abuse and, most importantly dark triad traits–narcissism, Machiavellianism, and psychopathy.
The authors note that the small sample size is a limitation to the validity of the study, so consider contributing to the research yourself in the comments.
-via Dave Barry | Photo: Pogrebnoj-Alexandroff
Source: neatorama