Neil deGrasse Tysonis a brilliant astrophysicist. He can explain black holes, dark matter and the birth of the universe. Just don't ask him about women's sports.

During an interview onBill Maher'sClub Randompodcast — which wasreposted by the channel on Thursday— Tyson doubled down on his now-infamous proposal to scrap sex-based sports categories and replace them with hormone-based categories.

Every month, Maher's team reposts a "Club RandomClassic" on YouTube. That's why clips from the November 2023 conversation are making the rounds on social media this week.

Neil deGrasse Tyson doesn't believe in sex-based sports categories.

(John Nacion/Variety via Getty Images)

Maher opened the door by referencing Tyson'sprior social media dust-up with former tennis star Martina Navratilova.

"You had a thing with Martina Navratilova," Maher said. "Because you think, like, guys with dicks should get in the women’s swimming pool, basically."

Tyson insisted he was misunderstood and launched into his actual solution.

"What I said was that, in this emerging space where you have people expressing themselves on a gender spectrum and you want to now compete in sports… that's still a frontier to be solved," Tyson said. "And I don't have the answer, but I can suggest one… Maybe we don't compete by gender anymore. We compete on hormone ratios."

Hormone ratios. That's the grand idea.

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