* Some (all?) Aboriginal Australians people can sleep outdoors in 40F (5C) weather without harm or covers. (maybe 45). I forgot the exact Temp but for others it is very dangerous to do that.
* Then there is adult milk digestion for Northern Europeans and some peoples in Africa (Masi I think). It was deemed a kind of parallel evolution.
* I remember seeing a blurb about some people in China a while ago, but I forgot what it was.
* Some (all?) Aboriginal Australians people can sleep outdoors in 40F (5C) weather without harm or covers. (maybe 45). I forgot the exact Temp but for others it is very dangerous to do that.
* Then there is adult milk digestion for Northern Europeans and some peoples in Africa (Masi I think). It was deemed a kind of parallel evolution.
* I remember seeing a blurb about some people in China a while ago, but I forgot what it was.