Exercise can make you smarter. An article in the New York Times describes research that found mice that exercised were smarter. Also elderly people who exercised (versus those that just stretched), had new linkages between neurons forming in their brains.

Other things that increase neuron linkages - marijuana, chocolate, sociability, moderate amounts of alcohol and black tea.

Things that decrease the brain’s ability to produce new neurons - stress, saturated fat and sugar and heavy drinking.

Pretty interesting…