I watched a show on creatures (bugs and stuff) that live in caves that lose their color. They pretty much turn white from being in the dark for all of their generations. I was wondering if us humans lived in caves and didn't go into any sunlight for some generations. Would we lose our color as well? And would black people also turn white if they did the same?
-
Yes, that's pretty much correct.
Humans require vitamin D to live, which in nature can only be created by sunlight hitting the skin. Originally, humans lived in parts of Africa where sunlight was abundant, so their dark skin blocked most of the sunlight to prevent them from getting burned. As people migrated north, there was less sunlight, so within a few generations lighter skin was selected for (evolved) to prevent vitamin D deficiency. Humans can't really survive without any sunlight at all, but if a group of people spent the majority of their lives in caves they would adapt to have very white skin.
Humans require vitamin D to live, which in nature can only be created by sunlight hitting the skin. Originally, humans lived in parts of Africa where sunlight was abundant, so their dark skin blocked most of the sunlight to prevent them from getting burned. As people migrated north, there was less sunlight, so within a few generations lighter skin was selected for (evolved) to prevent vitamin D deficiency. Humans can't really survive without any sunlight at all, but if a group of people spent the majority of their lives in caves they would adapt to have very white skin.
-
No, and things in dark places turn black in order to absorb any possible light there is to sustain there life