Re: Many mysteries
"You've completely mixed up races and species."
You appear incapable of understanding the word "and".
Both "species" and "race" look increasingly dubious as genetic understanding improves, but the usual understanding of "race" outside the US is a more or less isolated or homogeneous population within a species which has resulted in distinct genetic differences. Hence, Sapiens and Neanderthals, Polar bears and brown bears.
Human beings have been mixing populations for a very long time. These days, so are bears.
Still, at least I have another item for my "spot the racist" list.