Southpaw Struggles

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We all know about scissors, smudge marks, and those awkward desks -- but what makes life in the 21st century hard for left-handed people? Chris McManus, professor of psychology and medical education at the University College London and the author of Right Hand, Left Hand: The Origins of Asymmetry in Brains, Bodies, Atoms and Cultures, talks about the history of lefties, the science behind it and the modern-day inconveniences southpaws face.