Everyone's nose is a shape. Researchers may know . Researchers say it could be of the . People with noses live in warm, humid . People with noses live in colder, drier places. The nose makes the air we breathe is warm . It is like a temperature .
Researchers looked at the of over 2,600 Africans, Asians and Europeans. They checked their nose and height, and the between the . The could help with the heat or cold, and the if they go to countries. It is to know how our nose will change shape in the .