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  • Fearless mice? Study shows parasite could change brain chemistryadd to reading list  

    Posted on September 24, 2013 at 7:21 AM

    (CBS) A new study demonstrates that when mice are infected with a common parasite, they appear to lose their fear of cats. Professor of Medicine at the University of Southern California Dr. David Agus joins "CBS This Morning".

    By CBS News
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