...new work suggests long-ago lead exposure can make an aging person's brain work as if it's five years older than it really is. If that's verified by more research, it means that sharp cuts in environmental lead levels more than 20 years ago didn't stop its widespread effects....
CNN.com - January 28, 2008
http://www.cnn.com/2008/HEALTH/01/28/aging.brain.ap/index.html?eref=rss_health
