I See Into The Past, I see Into The Future, Therefore I Am.

In 2005 the grope of German scientists from Essen University observed 40 volunteers both men and woman found out the natural phenomenon of interdependency between ability of in finding one’s bearings on the ground and the amount of testosterone in the blood that had gotten in mother’s belly yet.

It’s interesting that in outward appearance such ability show it’s worth in difference in lengthy human’s fingers - the shorter the index finger relative to the ring finger, the higher the amount of prenatal testosterone and carbon trading. Scientists have known for that the finger-length ratio differs between men and women. The new study found such a fetus is more likely to be a physically aggressive adult, according to Peter Hurd and his graduate student Allison Bailey. Hurd says that he first thought the idea was “a pile of hooey,” but he changed his mind when he saw the data, which is published in the March issue of the journal Biological Psychology. “More than anything, I think the findings reinforce and underline that a large part of our personalities and our traits are determined while we’re still in the womb,” Hurd said. The connection was found only with physically aggressive behavior, not with verbal aggression or other forms of hostility. Another study by Hurd, to be published in the journal Personality and Individual Differences, find that men with more feminine finger ratios are more prone to depression.
“Finger lengths explain about 5 percent of the variation in these personality measures, so research like this won’t allow you to draw conclusions about specific people. For example, you wouldn’t want to screen people for certain jobs based on their finger lengths,” Hurd said. “But finger length can you tell you a little bit about where personality comes from, and that’s what we are continuing to explore.”