Why do Africans have nappy hair, while Arabs have straight hair?

Question

They both live under some what the same climate so why?

Answer 1

because Arabs are Caucasian.  although a lot of racists don't like to admit it.

Answer 2

Arabs dont all have straight hair!!!

Go to the library and see if they have any old books on or by Freya Stark and look at her photos of Arabs ... real Arabs not the hollywood version!

Answer 3

Arabs and North Africans are Caucasian. They can have kinky hair too though.

Answer 4

race ??

Answer 5

Nappy hair tends to have more air pockets in it, allowing for more air and ventilation to get between the hair and the scalp. This allows heads with nappier hair to remain cooler in hot enviorments. Since Africa is a very hot enviornment Africans have evolved nappy hair to keep their brains cool.

Answer 6

Because Neegroid Africans spent at least an extra 100,000 years developing genetically, very close to the Equator, and "spongy" hair produces a cooling effect, when sweating, similar to a radiator in a car!

Arabs (Caucasoids), who spent about that same amount of time, developing at 30 Degrees North Latitude, adapted to a desert climate, which can be very cold at night, and natural selection preferred to evolve a more layered-type of hairstyle, even though their skin color remained fairly dark!