Those with the most experience and testosterone exposure earned about six times as much as those with the least.

VOA: special.2009.02.25

Earlier work found that male stock traders made more money on days when their level of the male hormone testosterone was higher.

VOA: special.2009.02.25

Mister Gray says studies have linked a rise in testosterone levels to reduced stress in men.

VOA: special.2009.03.24

The longer the ring finger and the shorter the index finger, the greater the testosterone exposure.

VOA: special.2009.02.25

Testosterone is known to make people more sure of themselves and more willing to take risks.

VOA: special.2009.02.25

Mister Gray says one major difference is the way people react to the hormone testosterone.

VOA: special.2009.03.24

Females are also exposed to some testosterone in the womb.

VOA: special.2009.02.25

Individuals are exposed to testosterone while in their mother's womb.

VOA: special.2009.02.25

But high testosterone levels have no such effect on women.

VOA: special.2009.03.24