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Series

The T Files S1 — Origins

Berthold's roosters, a 72-year-old injecting dog testes, and the monkey-gland craze. Where the idea of a male hormone came from.

Parts: 5
By: Keen Clinician Team

Read in order

1. The Oldest Evidence About Testosterone Came From Castration, Not Chemistry

2. The Rooster Experiment That Invented Endocrinology

3. In 2002, Someone Remade Brown-Séquard's Extract. There Was Almost No Testosterone In It.

4. Freud and W.B. Yeats Both Had the Operation. It Did Nothing.

5. 1935: Three Laboratories, One Molecule, and the End of an Industry

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