Nature or nurture - why do some of us see red?

University of Manchester researchers are investigating why some people remain calm in the face of life's niggles, while others 'flip' with little provocation.

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<p><a href="http://www.physorg.com/news124640467.html">Nature or nurture - why do some of us see red?</a></p> <p>University of Manchester researchers are investigating why some people remain calm in the face of life's niggles, while others 'flip' with little provocation. <br></p>