In this episode, Sam Harris talks about the low number of women in physics in engineering: "there's got to be some differential interest here, and perhaps in certain cases aptitude when you're talking about the extremes of mathematical ability."
https://samharris.org/podcasts/245-can-talk-scary-ideas/

He think's there's considerable evidence for the hypothesis that the reason we see less women in engineering and physics is because there are less women at the top end of the distribution for mathematical ability (he used the word aptitude earlier, implying it's innate).
"I'm not sure there are any honest people left who think that bigotry is what explains that." - Sam Harris about the gender gap in STEM.
The Institute of Physics ( @PhysicsNews) disagrees
#WomenInSTEM
The Institute of Physics ( @PhysicsNews) disagrees
#WomenInSTEM
"Others are denied the opportunity to study physics due to the prejudice and stereotypes that they experience because of who they are. Many girls are told that physics is more suited to boys..." - the Institute of Physics. https://www.iop.org/about/strategy/limit-less
*and* engineering