As the human race migrated into the Northern Hemisphere, minor adaptive changes had to take place. Skin tone became lighter to absorb more of the sparse sunlight, and hair became straighter. Why? I speculate that this was for several reasons. In the Southern Hemisphere, sunlight and heat are more abundant than in the North. Curlier locks have more surface area in the knots and retain much more water. This allows more water to evaporate UP to the scalp and cool the brain. In the North, this is disadvantageous, because more water means more mold. Straighter knots retain less, which is good if there is less heat and sunlight. The blunted tips of African hair reflect this, and the 'speared' tips of European and Asian hairtypes reflect the need to drain off excess water.The picture below shows both, spear tips and blunt ends. Bob Marley's father was Scottish, and his mother was of African descent.Point is, be happy with what you have on your head, it shows the kind of place your ancestors come from!
updated by @the-rapture-of-exile: 02/14/15 06:11:48AM