You wanted to see what science has to say about us... and you went to Yahoo Answers? Seriously?
I was an adamant poster on Yahoo Answers' religion & spirituality section for years when I was younger... and after being there for years, I can tell you very directly, that 95% of the posters on that site have no idea what the hell they're talking about, but every single one of them thinks they know everything and they will chew you apart to the death to defend their own viewpoint.
Really, although YA has a few good posters, probably 90% of the posters are just teenagers with way too much time on their hands, trolls, or college students looking to pick arguments with people because they think they're smart. (I fell into the last category while I was still posting.)
The only thing that YA is good for is for asking questions that have to deal with asking people for their own life experiences on things. It is a GREAT place to ask for advice on makeup, skin care, and anything else where you need to find people who have been through similar life experiences. But on ANYTHING having to deal with politics, science, or social issues, you'd have better luck throwing s*** at a wall and hoping that it sticks. With anything trans related, I would stay as far away from there as possible unless you're just begging to end up crying because of dysphoria triggers. Because that site has so many bigoted a**holes, it really does make you weep for humanity.