For instance Asian have flat face and folds over their eyes, black people have broad nose and big lips plus nappy hair, native American are high cheekbone and sloping forehead. All this plus differences in skin color too. What is the purpose of this in term of natural selection? We humans became this way after thousands upon thousands of years how and why did we adapt these physical manners?
Most Helpful Guy
Pretty straight forward. Thinner noses are ideal for colder environments because it warms the air up through a narrow tube.
Larger upper bodies are suited to upper body activities and are more built for the cold. Today this works to its advantage in things like swimming, throwing, wrestling, power lifting etc all suited to longer upper bodies.
Whereas longer thinner legs aren't built for the above, their advantage is being better adapted to running, jumping, quick foot movement.
I. e Usain Bolt dominates running with long lean legs but he'd never be able to dominate swimming or power lifting. Equally phelps wouldn't fare well in running
Many things are obvious0