my apologies, the epiphany, baldness ensues brain compensate, why, the loss of thermal barrier, i.e., an impede against the transfer of heat has been lost thru baldness. hence the transfer is more abrupt, be it anarctica or amazon. how does abrupt rather instantaneous heat transfer compensate brains? usually old folks run metabolism slowly, maybe worn machinery. the heat runaway or the heat penetrate the brain are the two heat flow directions, heat moves seeking cold, a fact. so we conclude the favored body part called brain is used for sensating heat change immediacy and is used to protect. how so, protect?