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Science  07 Jun 2013:
Vol. 340, Issue 6137, pp. 1148-1150
DOI: 10.1126/science.340.6137.1148-c

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Adding to an often-used set of facial expression photographs of Caucasian adults, psychologists are now testing a new, multiethnic Child Affective Facial Expression set to see how well adults and children alike can identify children's facial expressions. And an expedition to study possible links between low blood oxygen levels and blood clot formation sets out on a climb toward the summit of France's Mont Blanc this week.