Brains Work Best At Age of 39
 

The loss of a fatty skin that coats the nerve cells, called neurons, during middle age causes the slowdown, experts say. The coating acts as insulation, similar to the plastic covering on an electrical cable, and allows for fast bursts of signals around the body and brain. When the sheath deteriorates, signals passing along the neurons in the brain slow down. This means reaction times in the body are slower too.

http://science.slashdot.org/article....30225&from=rss

Oh Crap! Seems I'm already over the hill and past my peak....

I feel it, at this rate, in six years I'll be godlike!

Look at it from a different perspective: from then on also that part of your body will go downhill

cheers