I can't help but wonder if the rest of them look like the one in the picture. IME so far they always have. The reason I wonder it is because I'm trying to figure out what accounts for a female looking practically indistinguishable from a male. It would seem to be something physical. Is it hormonal? Could it be part of what helps them to excel in these fields?
I'm not trying to be provocative, especially, but for a long time now it's niggled at me. I'm not talking about dressing butch and cutting your hair like a guy and wearing Birkenstocks or suits...though that is a factor. I'm talking about the faces themselves, the build of the body, which are very masculine. To the point that you often don't know immediately which is which. So many times I've been out places and seen couples...man/woman...who then turn out to be woman/woman. I just wonder what accounts for this and what the two might have to do with each other.
A couple of years ago, I was invited to be a piano accompanist for an all-women's volunteer chorus. The chorus advertises itself as a "lesbian" chorus, but I don't think they excluded straight women. And, of course I didn't survey each woman as to their orientation (!), so I figured in my mind that if the chorus wasn't 100% lesbian, it must have been in the high 80's to 90's. No basis for that, just a guess.
Given that background, here's my observation: there were several women in the group who could have easily passed for young men. I started to then formulate a hypothesis about "gender" that says that gender perhaps isn't necessarily a discrete characteristic. What if you're born a woman, as defined by what's between your legs only, but your other features lean masculine? And if your brain leans masculine, in that it desires other women? And vice versa: what if you're born male, as defined by the fact you have a penis, but you have effeminite features, gestures, thoughts, etc.?
So now picture gender as two bell curves which overlap each other somewhat: surely you can take a group of straight women and sort out the REALLY feminine ones from the not-so feminine ones (yet they're all straight). You can also take a group of guys and sort out the real he-man tough guys from the not-so he-man guys, yet they're all straight.
Conclusion: gender is not discrete, it's more of a continuum, but more like two overlapping bell curves instead of a linear continuum. Could be explained by mixtures of prevailing hormones, perhaps.