Nancy Segal Author, Entwined Lives: Twins and What They Tell us about Human Behavior (Plume, 2000)

Professor of Psychology
California State University, Fullerton
Fullerton, California

Richard Rose
Professor of Psychology
Indiana University
Bloomington, Indiana

Professor of Medical Molecular Genetics
Indiana University School of Medicine
Indianapolis, Indiana
Kerry Jang
Professor of Psychiatry
University of British Columbia
Vancouver, Canada

Twins have been called nature's ideal laboratories. Some have been studied by researchers since early childhood, others don't know they are twins until they're adults. Both kinds are invaluable for researchers studying health and behavior. In this hour of Science Friday, we'll take a look at twin studies and what they tell us about human nature and nurture.



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