I think what it all boils down to is this:
Ancient people (from Europe, China, Africa, the Mediterranean, etc.) were much more capable of traversing great distances and oceans than we have previously thought.
On good authority, even the blackest of Asian eyes are overwhelmed with a certain type of hazel gene that causes all of the color to gather at the rim of he iris at puberty. The sons of Ir are exceedingly potent.