According to new research in PNAS, males with high testosterone are more likely to become fathers, but once they have children, their testosterone levels fall dramatically.

Low serotonin is associated with "impulsive and highly negative reactions" which, if combined with high testosterone, may cause aggression if an individual becomes frustrated.

Since higher testosterone is linked to concrete thought, Dabbs speculates that an increased level of aggresso-juice helps trial lawyers stay single-minded.

Now let's say the suspect has low serotonin, high testosterone, just finished smoking a blunt and finished it off with a Colt 45.

The traits of some men with high testosterone may not suit them to rising in organizations where cooperation and consensus are valued, Dr. Dabbs noted.

But I found that among the Vietnam veterans, those who described themselves as entertainers also had high testosterone.

A theory that high prenatal testosterone leads to neuronal and axonal loss in the corpus callosum is supported by this hypothesis.

From the point of view of men, after all, constantly high testosterone is a real problem, as any 15-year-old boy trying to concentrate on his homework will tell you.

The men with low testosterone levels had a 33 percent greater risk of death during the next 18 years than the men with higher testosterone.