Why are african americans, latins, and arabic people have darker skin? Is it because of evalution?

Answer 1

It's because of evolution, yes. When people are exposed to higher levels of ultraviolet light, extra melanin in the skin will reduce the risk of skin cancer and will therefore be a survival advantage, so natural selection will favour dark-skinned individuals with the genes for producing extra melanin. Individuals with these genes are more likely to survive to childbearing age and will be more likely to pass on the genes. In colder climates, extra melanin does not affect the chances of survival as much so it is not selected for, though characteristics such as extra body hair and fat may be selected for.

Answer 2

Darker skin is caused by a increase in a skin chemical called Melanin (it's the same thing that causes freckles). Your body produces melanin to protect you from the sun (when you get a tan). Because African, Arabic, and Latino peoples developed in sunnier regions than Caucasians, their bodies grew used to developing melanin.

Answer 3

Darker people have more melanin-a pigment that provides coloring to your skin. It also provides protection from the sun and probably serves some other purpose we have not discovered. Most of the people on the planet have darker skin than white. You should be asking how light skinned-people survived without it.

Answer 4

The most fundamental reason for skin color differences is the fact that humans live at different latitudes. It is quite obvious that humans that have lived in equatorial areas for many many generations tend to have darker skin. As one moves from equatorial Africa toward the north there is a constant change in skin color. By the time you get to northern Scandinavia you have very light skinned people with blond hair and blue eyes, while people living near the equator have black skin, black eyes, and black hair. This is easy to understand. Take two tin cans and paint one black and the other white. Fill them with boiling water and measure their temperature five minutes later. Dark colors radiate heat faster than light ones, so the darker can will be cooler than the white one. In Africa the problems of heat release are very large. The brain cannot be allowed to overheat, and getting rid of the heat is critical.

Answer 5

Which do you think is the more plausible explanation? That seperated groups of humans bred with one another which exagerrated particular features unique to that population, resulting in the eventual appearance of "difference" (which you can easily observe going back the other way when couples of different ethnicities have children together), or that some Grand PooBah in the sky designed it that way?

Answer 6

Its called adaptation to the sun. Or some may erroneously call it 'micro-evolution'. A variation within a kind to adjust to the environment. People of African decent who move to northern areas and are not exposed to the sun lighten up, and the opposite for lighter skinned people who move out into the sun they darken.

Answer 7

yes its their invironment, eg.. Look at Africa, the sun is too scotching and burning that even the whites living in African turn Brown, so what do you expect for Africans to turn to which colour if whites become brown???
another example iam chocolate colour when iam in African, now iam in Europe for almost a year and iam light brown!, so you see... its the environment.

Answer 8

yes because of geographic location over time, better yet, why do people who live in certain areas have accents although speaking the same language (english)?

Answer 9

I was always taught that God created them that color to protect their skin from the hot sun. It makes perfect sense to me.

Answer 10

evolution stemming from changes in their environment.....just darker pigment to counter the deadly rays of the sun....