I went to the space museum recently, and there was in interesting display about research that had been done - I think in the 70s.
They were looking at whether men or women would make better astronauts. Women came on top in nearly every category - just as skilled, consumed less food and oxygen, reacted better to being weightless, remained healthier longer, better suited to the mental stress etc. There was a load more I can't remember.
And then they still went with men anyway. Because men. I wish I could say I'm surprised, but I'm not!