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The Historyscoper's Science and Technology Watch Blog Apr. 2, 2015

Friday, November 12, 2010

Cheer up, we were all born to laugh: Chuckling is instinctive but crying is learned

http://www.dailymail.co.uk/sciencetech/article-1328627/Cheer-born-laugh-Chuckling-instinctive-crying-learned.html
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