Well, yes, there have been several White Buffalos born recently, as prophecied by Ptesan-Wi. Perhaps the White Eyes will be defeated and the grass will grow belly high to the buffalo again.
Last I heard Caucasians, Negros and Mongoloids are not considered different species. Further, even though these races have been around for quite a while, none of them has evolved into a different species either.
When it happens you can cite it.
Of course that would be evidence of the supernatural. :-)