Hi all,
I'm a layperson, here to gather some information for curiosity only (not homework, promise!). My questions straddle several areas, some more loosely than others, so this may not be entirely appropriate place to ask. However, I thought to give it a go. Please keep in mind that this is a hypothetical scenario only:
What sort of circumstances - environmentally and evolutionarily - could have caused humans to have evolved with pure black or white skin? I mean that as in color, not ethnicity. I would appreciate as detailed a response as possible.
Hope someone is patient and kind natured enough to help a lay-bie out!