So we know there are black Vulcans, and it's fully plausible that just as in humans the ancestors of various species could adapt to local environments, or develop traits via random mutation and sexual selection.
But how many species seen have been multi-racial. And how many Vulcans would be black? As Tuvok and his family were the first black Vulcans we had seen up until then, maybe modern Vulcan evolution was reverse to our own, in that Vulcans evolved in temperate climate, but Tuvok's ancestors migrated to a warmer region.
But how many species seen have been multi-racial. And how many Vulcans would be black? As Tuvok and his family were the first black Vulcans we had seen up until then, maybe modern Vulcan evolution was reverse to our own, in that Vulcans evolved in temperate climate, but Tuvok's ancestors migrated to a warmer region.