Science Salon

This episode is a conversation based on two of Nancy Segal’s books The Twin Children of the Holocaust: Stolen Childhood and the Will to Survive and Gay Fathers, Twin Sons: the Citzenship Case that Captured the World. Shermer and Segal discuss: her historical interest in twins research and behavior genetics • the many different types of twins and family arrangements • twins separated accidentally • twins separated intentionally • twins reunited • a brief history of twins research • Josef Mengele • Minnesota Study of Twins Reared Apart • the gay fathers and twin sons story • immigration and naturalization law related to IVF, twins, gay couples, etc. • abortion • eugenics and the Nobel Prize sperm bank • the meaning of “heritability” • the relative role of nature and nurture in how lives turn out • the “nonshared environment.” Nancy Segal is a Psychology Professor, and Director and Founder of the Twin Studies Center at California State University, Fullerton. She has authored over 300 scholarly articles and eight