Staggering that people want to rail against nature because their ideology doesn't conform to reality.

The research on male/female dimorphism is overwhelming (though today the researchers won't say "dimorphism").

Here's a great article from the 90's, courtesy of Stanford... You know, the "smart people".

There's a great bit of more-recent research where they can predict, with 97% accuracy, whether a brain scan is of a male or female, just from structure alone. I'll link it later when I can get to it.

Sorry for the delay: Patterns In the Human Brain Mosaic Discriminate Males from Females.

I was wrong, accuracy is only 93%.