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Dynamic Duos: Why Science Loves Twins

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Nancy Segal, professor of psychology and director of the Twin Studies Center at Cal State Fullerton, discusses the origins of twin research design in a piece explaining why science loves studying twins. According to Segal, the first attempts to study twins started in 1875 when English scientist Francis Galton, who was also Charles Darwin’s half-cousin, “first came upon the twin research design, which is really a very simple and very elegant way of looking at behavior.”  

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