WASHINGTON (Reuters) - With a little help from Clint Eastwood, Jennifer Aniston and Josh Brolin - or at least photos of them - scientists have gained a new understanding of how memories of everyday events are formed in the brain.br clear='all'/img width='1' height='1' src='http://reuters.us.feedsportal.com/c/35217/f/654220/s/47c11f6f/sc/28/mf.gif' border='0'/div class="feedflare"
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