Because it is cold there, in order to let the inhaled cold air have enough space to warm into warm air, we must straighten our nose! After directional selection by natural selection, the population in each region will present different forms, but it will not form reproductive isolation.

Most parts of Europe are in high latitudes, and the climate is generally cold. Cold air entering the human body needs a heating process to prevent the internal environment from being stimulated too much.

So cold air must be heated through the nasal cavity, and the nose is tall and long to adapt to the environment.

Kinship is actually right. Because after natural directional selection, the gene frequency of the population will change directionally, and this change will be passed on to future generations.