600 years since whitey descended back to the tropics? Are you serious? Is that a joke?
Your timeline is totally 100% fucked
Why not?
Here is my reasoning: There are many breeds of dogs that simply did not exist 300 years ago that exist today. Of course, dogs can regenerate much more quickly than humans, so necessarily, it takes longer for humans to genetically develop different features for which we assign the term "race," but are no less arbitrary than the hair on a black lab and the hair on a golden retriever is to different dogs.
The discovery of pyramids deep underwater off the shores of Cuba throws the whole "600 year" time frame for people moving into the tropics totally out the window.
LOL!!! You don't believe in AGW despite years of data and known scientific facts about the properties of GHGs, but a few grainy photos and videos is "proof"?!?!