Sorry to edit the title, i found the original much to clickbait-ish. Also, sorry it's Slate, which is not always the greatest source.
This article is critical for me, as a trans person, because of its evidence of trans and non-binary people in historical Europe. Examples of "3rd gender" people and trans people are relatively findable from all sorts of other cultures, from Ancient Greece to India, but very hard to find from later European cultures - And I've been looking, because it always seemed like a weird gap to me. Like, maybe it was because of population pressures in those other places whereas the Black Death and other subsequent plagues had removed that pressure from Europe? I was throwing things at the wall to see if anything stuck.
Turns out I was just looking in the wrong places. I didn't even know the right places existed.