what's that rule about research that most research should come with the disclaimer "in mice"?

You're probably thinking of the twitter account @justsaysinmice, https://twitter.com/justsaysinmice.

For the uninitiated and otherwise unaware, many studies regarding illnesses, disease, nutrition, exercise, medicine, etc. perform clinical trials with mice. Resultant publications are picked up by news outlets who headline the results, without the caveat that the results were only found in mice. Mice are, notably, not humans and the results don't (in fact, rarely ever) carry over 1:1.

Humans evolved as endurance hunters. We have some of the best heat management features of all animals like no hair and sweating.