Charles Darwin described as early as the nineteenth century that every living population adapts to its given environmental conditions over the course of many generations.
The human being is also evolving ever further. Darwin already counted in 1871 in “The Descent of Man” a large number of body parts, which have lost their usefulness in the course of the evolution and therefore ever further develop back.
There will be no need of body hair in the future, since warm clothing makes the fur largely superfluous, so that hairs serves only as a bacterial herd.
The hollow bodies between the nose, ears and eyes serve to ease the skull. Because of the high risk of inflammation, modern humans already tend to narrow nasal sinuses.