Arrrrgh

Check out this Science Friday segment. I only caught part of it, but it was enough to get the idea: neuroscientists have long experimented on male-only animals because they thought female animals' hormone fluctuations would be a confounding variable. The scientists thought they would get closer to the truth if they excluded half of the rodent populations they studied.

Well, it turns out that male rodents have hormones too! And guess what... they fluctuate even more than those of the females!

This has only recently been figured out. So I don't know what that means for decades of research findings, even for male rodents, let alone for rodents in general or for the humans of all genders they are meant to serve as models for.