I like the theory that Neanderthals were wiped out by global warming, and chronic sinusitis. One leading to another.
Though there are only a handful of surviving Neanderthal skulls, some have a bony protuberance in their sinuses. A seeming adaptation for extremely cold weather, it would slow down and moisturize air inhaled through the nose, a big plus when it is cold and dry out.
But when it warms up and there is higher humidity, it is a recipe for debilitating, chronic sinusitis. Even today, those cursed with a chronic sinus infection feel exhausted and weak even after a few months.
Since most living people carry Neandertal DNA, they’re not extinct, they are our ancestors.
” ... chronic sinusitis ...”
Very interesting