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Uploaded by CBSNewsOnline on Nov 19, 2007
Katie Couric says her optimism may be the result of a biological reason. According to new research, the human brain is built for optimism and having a bright outlook could mean a longer life. (CBSNews.com)
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first plox?
Deluxe312 4 years ago
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first plox?
Deluxe312 4 years ago