
The Secret Twin Study: Files Sealed Until 2065
From Conspiracy Theories by Spotify Studios
April 15, 2026 · 51 min
About this episode
The episode explores the controversial twin study hidden for decades and features expert Dr. Nancy Segal.
Does nature or nurture shape who we are? Does our personality come from our genes, or the environment we live in? Countless scientific studies on the subject have been published. But one such study – a collaboration between a psychoanalyst and a New York adoption agency – was instead hidden away for decades. Could it be because the study was founded on lies? Because it was unethical? Or might there be some other secrets hiding in the files of Dr. Peter Neubauer? Today, we welcome a special guest: twin studies expert Dr. Nancy Segal. Check out her book! Deliberately Divided: Inside the Controversial Study of Twins and Triplets Adopted Apart Help us reach 10k followers on Instagram! @theconspiracypod Learn more about your ad choices. Visit podcastchoices.com/adchoices
People in this episode
Guest: Dr Nancy Segal
Topics covered
- nature vs nurture
- twin studies
- psychology
- ethics in research
Keywords
- Peter Neubauer
- adoption
- scientific studies
- controversy
Mentioned in this episode
Products: Deliberately Divided: Inside the Controversial Study of Twins and Triplets Adopted Apart
Books & works: Deliberately Divided: Inside the Controversial Study of Twins and Triplets Adopted Apart Help
Places: New York
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