The polar fox ( Alopex lagopus, in the photo) and the Eskimos have something in common.
Compared to the desert fox, in fact, the polar fox has small ears, limbs and tail. Similarly, in Eskimos the arms and legs are proportionally shorter than the torso compared to those of black individuals.
The reason for these features? Simple: the lower the surface of the body ends, the lower the heat dissipation, therefore the loss of energy. This is a very important requirement for survival in cold climates.
On the contrary, in hot climates it is important to be able to dissipate the excess of heat, so like black foxes individuals of the black race tend to have proportionately short busts and long limbs.
All this means that, for the same calories ingested and type of diet, an Eskimo (or a short-term individual) will be more inclined to gain weight than a black individual (or a long-limbed individual).
