🧵THREAD: SCIENTISTS SAY SEX IN HUMANS IS BINARY. 1. Nobel Prize-winning biologist Dr. Christiane Nüsslein-Volhard: "All mammals have two sexes a

🧵THREAD: SCIENTISTS SAY SEX IN HUMANS IS BINARY. 1. Nobel Prize-winning biologist Dr. Christiane Nüsslein-Volhard: "All mammals have two sexes a