Katharine Sedivy-Haley
@ksedivyhaley.bsky.social
Scientist, policy wonk, specfic fan
Excellent short thread on why the idea that "XX chromosomes = female and XY = male" is based on biology decades out of date.
In 1890, the X and Y chromosomes were discovered. It was found that the men who were tested had 46 chromosomes, including an X and a Y, while women who were tested also had 46 chromosomes, including 2 X chromosomes.
So obviously the conclusion was that the Y chromosome defined masculinity.
So obviously the conclusion was that the Y chromosome defined masculinity.
January 23, 2025 at 8:35 PM
Excellent short thread on why the idea that "XX chromosomes = female and XY = male" is based on biology decades out of date.
Eclipse seen from space (more details in thread).
November 2, 2023 at 10:12 PM
Eclipse seen from space (more details in thread).
Reposted by Katharine Sedivy-Haley
Every school. Every workplace. This isn’t hard. www.newscientist.com/article/2398...
Schools cut covid-19 sick days by 20 per cent using HEPA air filters
The eagerly awaited finding comes from the first randomised trial of putting HEPA filter machines into classrooms
www.newscientist.com
October 22, 2023 at 7:16 AM
Every school. Every workplace. This isn’t hard. www.newscientist.com/article/2398...