White people in Europe and America have three-dimensional facial features, angular facial features, straight and high noses, sunken eye sockets, prominent cheekbones and hard jaws. Asians have gentle faces, soft lines, full foreheads, low noses and round cheeks. The ancestors of Europeans and Americans lived in northern Europe, with long winters and often worked in the snow and ice, where the climate was cold and the air was dry and cold, and the air inhaled into the human body needed a process of heating and humidifying. In the long-term evolution, they gradually developed into long and big noses, mainly to increase the process of humidifying and heating the air. The place where the ancestors of Europeans and Americans lived was covered with ice and snow all the year round, dazzling under the sunlight. The deep eye sockets of Europeans and Americans are designed to prevent dazzling light, just like the effect of parasols.