There's a subgroup of Asians spanning the Himalayas and east Asia that have blue bottommed babies that is generally believed to denote an ancestry that shares Genghis Khan, iirc. Anyone know whether this group is the same as the one that shares the Denisovan gene?<p>There's one other thing that I think people living in the Himalayas have, myself included, that helps and that is proportionately humongous lungs. This is probably evolution at work over the course of centuries.