Scientists make discovery in Alzheimer's
(AP)


<p><a href="http://us.rd.yahoo.com/dailynews/rss/health/*http://news.yahoo.com/s/ap/20060810/ap_on_he_me/toxic_aging"><img src="http://d.yimg.com/us.yimg.com/p/rids/20060810/i/r1122735531.jpg?x=130&y=66&sig=iWLfrS9d2NS5YefZJhNb4Q--" align="left" height="66" width="130" alt="A split-view image showing PET scans of a normal brain (L) and a brain with Alzheimer's disease. Deficits in certain neurological and psychological areas strongly predict conversion to Alzheimer's disease (AD) in individuals with mild cognitive impairment, research shows. REUTERS/National Institute on Aging/Handout" border="0" /></a>AP - Scientists have discovered molecular janitors that clear away a sticky gunk blamed for Alzheimer's disease — until they get old and quit sweeping up.</p><br clear="all"/>