High testosterone = low intelligence?
This explains a lot about the behavior of some men. Researchers have found that too much testosterone can kill brain cells.
One of the researchers, Barbara Ehrlich (yes, a woman) of Yale University, says, "...when you have high levels of steroids, you have high testosterone and that can destroy the nerve cells. We know that when you lose brain cells you lose function."
Just to be fair, Ehrlich's team also tested the "female" hormone, estrogen. "We were surprised," Ehrlich says, "but it actually looks like estrogen is neuroprotective. If anything, there is less cell death in the presence of estrogen."
So an excess of testosterone kills brain cells, but estrogen keeps cells alive?
Women should be running the world.