Scientists think humans evolved lighter skin in Europe as an adaptation to less sunlight.
Scientists think humans evolved lighter skin in Europe as an adaptation to less sunlight.
科学家认为欧洲人的肤色很浅的原因正是为了避免吸入过多的阳光。
Scientists think humans evolved lighter skin in Europe as an adaptation to less sunlight.
科学家认为欧洲人的肤色很浅的原因正是为了避免吸入过多的阳光。