Scientific American: Rat Study Shows That Exercise Promotes Neuron Growth

http://www.sciam.com/print_version.cfm?articleID=000A30FD-3AC2-10B2-BAC283414B7F0000

Regular exercise can benefit the body in a number of ways, from aiding weight loss to increasing energy levels and improving cardiovascular health. Findings published online this week by the Proceedings of the National Academy of Sciences bolster the notion that the brain, too, can profit from physical activity. Results of rat studies indicate that exercise can stimulate the recovery of injured neurons.

But do we really want smarter rats?

OK, ok. Another damn reason to exercise.