U.S. & World
Study: Good night's sleep cleans out gunk in brain, may help slow progress of dementia
Published: Oct. 17, 2013 12:00 a.m.
Updated: Oct. 17, 2013 12:49 p.m.
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Oct. 17, 2013 1:13 p.m.
So this is why I can never remember what I watched on TV the night before.